Find the acceleration of the distance versus time function: s = 2t^2 + 2

Answers

Answer 1

Answer:

4

Explanation:

Speed = 2t²+2

by differentiation,

ds/dt=Velocity=4t

dv/dt=Acceleration=4


Related Questions

I need to figure out the missing boxes and work out the power, work done or time taken

Answers

To calculate the missing values in the table, we can use the formulas:

Power = Work Done / Time TakenWork Done = Power x Time TakenTime Taken = Work Done / Power

Using these formulas, we can fill in the missing values:

Power(W)          Work Done(J)    Time Taken(s)

For a,. 3000       90000                30

For b,. 20            100                      5

For c,. 50            100                      2

For d. 700           245                     0.35

For e. 25             1875                     75

For f. 50000       500000              10

For g. 150            450                      3

For h. 0.5            10                         20

What is power?

Power is the rate at which work is done or energy is transferred. Mathematically, power is defined as the amount of work done or energy transferred per unit time. The unit of power is the watt (W), which is equal to one joule of work per second.

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To calculate the missing values in the table, we can use the formulas:

Power = Work Done / Time Taken

Work Done = Power x Time Taken

Time Taken = Work Done / Power

Using these formulas, we can fill in the missing values:

Power(W)          Work Done(J)    Time Taken(s)

For a,. 3000       90000                30

For b,. 20            100                      5

For c,. 50            100                      2

For d. 700           245                     0.35

For e. 25             1875                     75

For f. 50000       500000              10

For g. 150            450                      3

For h. 0.5            10                         20

What is power?

Power is the pace at which labour or energy is done or transferred. Power is described mathematically as the quantity of labour done or energy moved per unit time. The watt (W) is the measure of electricity, and it equals one joule of work per second.

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the mass of a particular bar of gold-pressed latinum (from star trek) has a mass of 100 grams. what is the mass of this bar when it is brought to the moon?

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The mass of a particular bar of gold-pressed latinum on the moon is 100 grams.

Gold-pressed latinum (GPL) is a kind of currency in the Star Trek world. Latinum, a rare silver-colored liquid, is pressed between gold layers to make GPL, which is valued in the Federation as a rare and valuable resource. The value of GPL is measured in amounts of gold. It can be used in various types of exchange and trade.

The mass of a particular bar of gold-pressed latinum when it is brought to the moon is the same as its mass on Earth. The bar's mass will stay the same no matter where it is located because mass is a constant property of an object. Mass is a measure of an object's resistance to acceleration in response to a force. It is a measure of how much matter is contained in an object.

As a result, if an object has a mass of 100 grams on Earth, it will have the same mass on the moon or any other location in the universe. Therefore, the mass of a particular bar of gold-pressed latinum when it is brought to the moon is 100 grams.

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is the current flowing out of a resistor smaller than the current flowing into it. if not, then do resistors not actually slow down the flow of charge. eplain and give exampes\

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The current flowing out of a resistor is typically smaller than the current flowing into it. Resistors do not actually slow down the flow of charge, they merely convert electrical energy into heat.

The statement that the current flowing out of a resistor is smaller than the current flowing into it is correct. This is because resistors slow down the flow of charge. The amount of current flowing through a resistor is determined by the amount of voltage across the resistor and the resistance of the resistor. When the voltage across the resistor increases, the current flowing through it also increases.

Conversely, when the resistance of the resistor increases, the current flowing through it decreases. Resistors are used to control the flow of current in electrical circuits. They are used in a variety of applications, such as in voltage dividers, filters, and voltage regulators.

For example, a voltage divider is a circuit that divides a voltage into two or more parts. A voltage divider is made up of two resistors in series, and the output voltage is taken across one of the resistors. The amount of voltage across the output resistor is determined by the values of the two resistors.

If the two resistors are equal, the output voltage will be half the input voltage. If the output resistor is smaller than the input resistor, the output voltage will be less than half the input voltage. Conversely, if the output resistor is larger than the input resistor, the output voltage will be greater than half the input voltage.

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The types of energy in a wave come from the ______ of the wave (potential) and the ______ of the water particles in their orbits (kinetic).

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The types of energy in a wave come from the elevation of the wave (potential) and the motion of the water particles in their orbits (kinetic).

What is energy?

Energy is the ability to do work. The energy of a wave is measured by its amplitude or wave height. The more energy a wave has, the higher its amplitude. The energy of the wave is the sum of the potential energy and kinetic energy of the water molecules that make up the wave.

What is the potential energy of a wave?

A wave has potential energy, which is the energy it possesses due to its position. When a wave is high, it has a lot of potential energy, which can be used to do work. Potential energy is converted to kinetic energy when the wave moves.

What is kinetic energy in a wave?

The water particles that make up the wave are in motion. This motion is referred to as kinetic energy. The energy is generated when the wave is in motion. The faster the wave moves, the more kinetic energy it has. Kinetic energy is converted to potential energy when the wave is at its peak.

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How does changing the mass of the black hole affect its Schwarzschild radius? Specifically, if we double the mass of the black hole, which of the following statements is true?The volume from which light cannot escape will get bigger.The Schwarzschild radius of the black hole also doubles.If the mass of the black hole doubles, the Schwarzschild radius of the black hole also doubles.A small, stellar-mass black hole with three times the mass of the Sun (5.97×1030 kg5.97×1030 kg) is roughly 9 km across, about the size of a city of a few tens of thousands of people.The Schwarzschild radius depends on the mass, MBMMBM, of the black hole.

Answers

Option 2) is true. If the mass of the black hole doubles, then the Schwarzschild radius of the black hole also doubles.

The Schwarzschild radius of a black hole depends on its mass. When the mass of the black hole changes, its Schwarzschild radius is also affected. Specifically, if we double the mass of a black hole, the Schwarzschild radius of the black hole also doubles. The Schwarzschild radius is defined as the distance from the center of a black hole at which an object would need to be in order to escape its gravitational pull. It is represented by the equation Rs = 2GM/c² where Rs is the Schwarzschild radius, G is the gravitational constant, M is the mass of the black hole, and c is the speed of light.

The formula implies that Schwarzschild radius depends on the mass of the black hole.Therefore, if the mass of the black hole doubles, then the Schwarzschild radius of the black hole also doubles. Hence, option 2 is the correct statement.

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Is lead is melted I’m into liquid to form pellets a physical change

Answers

Yes, melting lead into a liquid to form pellets is a physical change.

This is because the chemical composition of lead remains the same even after it has been melted and then solidified into pellets. In other words, the molecular structure of lead does not change during the melting process, but only the physical state of the material changes from a solid to a liquid and then back to a solid. This type of change is reversible and can be undone by cooling the lead pellets to their solid state. Therefore, melting lead to form pellets is an example of a physical change rather than a chemical change.

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--The complete Question is, Is lead melting into liquid to form pellets a physical change? --

An aircraft of mass 3.2 * 10^5 kg accelerates along a runway. calculate the change in kinetic energy in mega joules when the aircraft accelerates a) 0 to 10m/s b) From 30m/s to 40 m/s c) From 60m/s to 70m/s​

Answers

Explanation:

E=(mv²)/2 ΔE = E2-E1 = (m(v2²-v1²))/2 = ?

от этогo:

а) ΔE = 16 MДж

б) ΔE = 112 МДж

c) ΔΕ = 208 МДж

A plane has an airspeed of 200 mph. The pilot wishes to reach a destination 900 mi due east, but a wind is blowing at 20. 0 mph in the direction 60. 0 ∘ north of east

Answers

The plane's heading is 4.61 degrees south of east, which is the direction the pilot needs to steer the plane in order to reach her objective and the trip takes 1.83 hours.

The airspeed of 200 mph can be broken down into its x and y components as follows: Vx = 200 mph * cos (0°) = 200 mph Vy = 200 mph * sin (0°) = 0 mph To solve this problem, we can break down the velocity vectors into their x and y components: The airspeed of 200 mph can be broken down into its x and y components as follows: Vx = 200 [tex]mph * cos (0°) = 200 mph Vy = 200 mph * sin (0°) = 0 mph[/tex]

The wind velocity of 20.0 mph at an angle of 60.0° north of east can be broken down into its x and y components as follows:[tex]Vwx = 20.0 mph * cos(60.0°) = 10.0 mph Vwy = 20.0 mph * sin(60.0°)[/tex] = 17.3 mph The resultant velocity vector is the vector sum of the airspeed and the wind velocity: Vrx = Vx + Vwx = 200 mph + 10.0 mph = 210 mpm Vry = Vy + Vwy = 0 mph + 17.3 mph = 17.3 mph

The speed of the plane relative to the ground is the magnitude of the resultant velocity vector:[tex]|Vr| = sqrt (Vrx^2 + Vry^2) = sqrt ((210 mph) ^2 + (17.3 mph) ^2) ≈ 211[/tex]mph The direction of the plane's velocity relative to the ground is given by the angle that the resultant velocity vector makes with due east:[tex]θ = atan(Vry / Vrx) = atan(17.3 mph / 210 mph) ≈[/tex] 4.7° north of east

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Complete question is :

A Plane Has An Airspeed Of 200 Mph. The Pilot Wishes To Reach Adestination 600 Mi Due East, But A Wind Is Blowing At 50 Mph In Thedirection 30o North Of Eastpart Ain What Direction Must The Pilot Head The Plane In Order To Reachher Destination? (2sig Figs)Part Bhow Long Will The Trip Take?(2 Sig Figs)Thanks!

a plane has an airspeed of 200 mph. the pilot wishes to reach adestination 600 mi due east, but a wind is blowing at 50 mph in thedirection 30o north of east

part A

in what direction must the pilot head the plane in order to reachher destination?

part B

how long will the trip take?

When a person is involved in a car accident, why is the likelihood of injury greater in a head-on collision as opposed to being hit from behind? Answer using the concepts of relative velocity, momentum, and average force. (Select all that apply. )


1. The change in momentum is greater in the head-on collision.

2. The momentum of the driver relative to the ground is greater in a head-on collision.

3. The velocity of the driver relative to the ground is greater in a head-on collision. 4. The average force on the driver is greater in the head-on collision.

5. The collapse of the crumple zone in the front of the car occurs only in the head-on collision

Answers

The proper responses are: The head-on collision results in a bigger change in momentum. In a head-on collision, the driver is subjected to a greater average force.

Explanation: When an automobile collides, the external force acting on it causes a change in the vehicle's momentum. ... a The shift in momentum is greater in a head-on collision because the relative speeds of the two vehicles are higher. This increases the probability of injury because more force is being exerted to the car and its occupants. In addition, due of the shorter duration of impact in a head-on collision, the average force on the driver is higher. in a crash with the back. As a result, there is a higher average force since the force is delivered for a shorter period of time. Although this happens in both head-on and rear-end collisions, the collapse of the crumple zone in the front of the automobile also helps to absorb impact energy. The chance of injury in a collision is not primarily determined by the driver's momentum and velocity in relation to the ground, however they may have an impact on the degree of the injury.

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a car is traveling with a velocity of 17.0 m/s on a straight horizontal highway. the wheels of the car have a radius of 48.0 cm. if the car then speeds up with an acceleration of 2.10 m/s for 5.10 s, find the number of revolutions of the wheels make during this period

Answers

The wheels make approximately 47.65 revolutions during the 5.10 s period.

What is Linear Speed?

Linear speed, also known as tangential speed, is the distance traveled by an object in a circular path per unit of time, measured in units such as meters per second (m/s) or kilometers per hour (km/h). It is the magnitude of the velocity vector of an object moving in a circular path at a constant speed, and is perpendicular to the centripetal acceleration vector.

The linear speed of the wheels is equal to the velocity of the car:

v = 17.0 m/s

The circumference of the wheels is:

C = 2πr = 2π(0.48 m) = 3.01 m

The angular speed of the wheels is related to the linear speed by:

ω = v/r

Therefore, the initial angular speed of the wheels is:

ω₀ = v/r = 17.0 m/s / 0.48 m = 35.42 rad/s

The final angular speed of the wheels after accelerating for 5.10 s at a constant rate of 2.10 m/s² is given by:

ω = ω₀ + αt

where α is the angular acceleration of the wheels. Since the wheels are assumed to roll without slipping, the linear acceleration of the car is equal to the angular acceleration of the wheels:

α = a/r = 2.10 m/s² / 0.48 m = 4.38 rad/s²

Substituting the given values into the equation for angular speed, we have:

ω = 35.42 rad/s + (4.38 rad/s²)(5.10 s) = 58.64 rad/s

The number of revolutions made by the wheels during this period is equal to the change in the angle of rotation of the wheels:

Δθ = ωt

Substituting the given values, we have:

Δθ = (58.64 rad/s)(5.10 s) = 299.58 rad

The number of revolutions is equal to the angle of rotation divided by 2π:

n = Δθ / 2π = 299.58 rad / 2π ≈ 47.65 revolutions

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A ball rolls across the floor, slowing down with constant acceleration of magnitude . The ball has positive velocity ???? after rolling a distance x across the floor.
Calculate the ball's initial speed ????0 if ????= 4.51 m/s2, ????=11.17 m/s, and x=2.66 m.

Answers

A ball rolls across the floor, slowing down with a constant acceleration of magnitude a = 4.51 m/s2.

The ball has positive velocity v after rolling a distance x = 2.66 m across the floor.

To calculate the ball's initial speed v0 if

v = 11.17 m/s.

The initial velocity of the ball, v0 =?

The final velocity of the ball, v = 11.17 m/s

The acceleration of magnitude a = 4.51 m/s2

Distance travelled, x = 2.66 m

If an object has initial velocity v0, constant acceleration a, and travelled distance x, then its final velocity is given by:

v2 = v0² + 2ax

Here, the ball's initial velocity is v0, and its final velocity is v.

After substituting the given values, we have:

v2 = v0² + 2ax

=> (11.17)²

= v0² + 2(4.51)(2.66)

=> 124.57

= v0² + 25.39

=> v0² = 124.57 - 25.39

=> v0² = 99.18 => v0 = √99.18

=> v0 = 9.96 m/s

Hence, the initial velocity of the ball is v0 = 9.96 m/s.

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When the rock hlt Cesar, the impact was softened by several protective features of the head. Which of the following structures would have helped to protect the brain from the external force? View Available Hint() Bone Oligodendrocytes Cerebrospinal fluid Basal ganglia Hair Dura mater White matter

Answers

The structure that would have helped to protect the brain from the external force when the rock hit Cesar are as follows: Dura mater and Cerebrospinal fluid.

What is the central nervous system? The central nervous system (CNS) is responsible for processing incoming stimuli from the peripheral nervous system and producing a coordinated response. It includes the brain and the spinal cord.

The brain is the largest component of the CNS, comprising 2% of the body's weight but consuming about 20% of its oxygen and nutrients. It consists of three main parts: the brainstem, the cerebellum, and the cerebrum.

The brainstem is responsible for regulating critical functions like respiration, circulation, and digestion; the cerebellum controls motor coordination, and the cerebrum is the area of the brain responsible for sensory perception, emotion, and movement.

What is external force? External forces, also known as contact forces, are forces that act on an object as a result of its interaction with its surroundings. Forces that do not require contact to take effect, such as gravitational and magnetic forces, are not considered external forces.

Examples of external forces are gravity, air resistance, tension, and friction. Dura mater and Cerebrospinal fluid as the structure that would have helped to protect the brain from the external force when the rock hit Cesar. When a rock hits Cesar, the external force created by it must be transferred to the skull, and ultimately the brain.

However, several protective features of the head help to reduce the severity of the impact. The brain is protected by two main structures: the dura mater and the cerebrospinal fluid.

The dura mater is the outermost layer of the meninges, which is a protective membrane covering the brain and spinal cord. It acts as a cushion, absorbing some of the external force generated by the impact.

Cerebrospinal fluid is a clear liquid that flows throughout the central nervous system, filling the space between the brain and the skull. It acts as a shock absorber, reducing the impact's intensity by distributing the force more evenly.

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which of the following actions will cause the relative humidity of an air parcel to increase? select all that apply
a. Keep the parcel’s temperature constant and increase the parcel’s dew point
b. Decrease the parcels temperature and increasethe parcels dew point
c. Keep the parcel’s temperature constant and keep the parcels dew point constant
d. Increase the parcels temperature and increase the parcels dew point
e. Keep the parcels dew point constant and increase the parcels temperature

Answers

The relative humidity of an air parcel will increase if any of the following actions are taken:

Keep the parcel’s temperature constant and increase the parcel’s dew pointDecrease the temperature of the parcel and increase the parcels dew pointIncrease the temperature of the parcel and increase the parcels dew pointKeep the parcels dew point constant and increase the temperature of the parcel

What is relative humidity?

To understand this further, we can look at the formula for relative humidity, which is the amount of water vapor in the air divided by the amount of water vapor that can exist at a particular temperature. When the temperature is kept constant and the dew point increases, the amount of water vapor in the air increases, resulting in an increase in relative humidity.

The followings are the given options and the actions they will take that will cause the relative humidity of an air parcel to increase:

Option A: Keep the parcel's temperature constant and increase the parcel's dew point. This action would increase the RH of the air parcel because it will increase the quantity of water vapor in the air parcel. As the parcel's temperature is constant, the ability of the air to hold water vapor also remains constant.

Option B: Decrease the parcel's temperature and increase the parcel's dew point. This action would also increase the RH of the air parcel. As the temperature of the parcel decreases, the amount of moisture that the air can contain also decreases. When the dew point is raised, the quantity of water vapor in the air parcel rises relative to the amount it can carry.

Option C: Keep the parcel's temperature constant and keep the parcel's dew point constant. In this case, there will be no increase in RH because the quantity of water vapor in the air parcel will remain the same as the ability of the air to hold water vapor remains constant.

Option D: Increase the parcel's temperature and increase the parcel's dew point. Increasing the parcel's temperature will raise the ability of the air to hold water vapor, but it will not increase the amount of water vapor in the air parcel. As a result, the RH of the air parcel will decrease.

Option E: Keep the parcel's dew point constant and increase the parcel's temperature. This action will also decrease the RH of the air parcel as it will increase the amount of moisture that the air can hold. Thus, the relative humidity will decrease.

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Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2.

Answers

Answer:

6n

Explanation:

Given:

Force acting by student 1 = 10 N

Force acting by student 2 = 4 N

Find:

Net force acting on the board

Computation:

Net force acting on the board = Force acting by student 1 - Force acting by student 2

Net force acting on the board = 10 N - 2 N

Net force acting on the board = 6 N

An asteroid Swift ha 3700 n on Earth what is the masa of the asteroid?

Answers

The mass of the asteroid Swift is approximately 377.55 kg.

What is mass?

Mass can be best described as the amount of matter present in any object or body.

On Earth, the acceleration due to gravity is approximately 9.8 m/s^2.

To calculate the mass of the asteroid Swift, we will  convert its weight from newtons to kilograms (kg), which is the unit of mass in the International System of Units (SI):

Weight = 3700 N

Acceleration due to gravity on Earth (g) = 9.8 m/s^2

Weight = Mass x Acceleration due to gravity

Mass = Weight / Acceleration due to gravity

Mass = 3700 N / 9.8 m/s^2

Mass = 377.55 kg

In conclusion,  The mass of the asteroid Swift is approximately 377.55 kg.

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a copper wire with a diameter of 1.63 mm and a length of 29.0 m has a current of 15.0 a flowing through the wire. what is the resistance (r) of the wire what is the change in voltage from one end of the wire to the other end

Answers

The resistance of the copper wire is approximately 0.026 ohms and the change in voltage from one end of the wire to the other end is approximately 0.39 volts.

To calculate the resistance of the copper wire, we can use the formula:

R = ρL/A

where R is the resistance in ohms, ρ is the resistivity of copper (1.68×10−8 ohm-meters), L is the length of the wire in meters, and A is the cross-sectional area of the wire in square meters.

First, we need to convert the diameter of the wire to meters:

d = 1.63 mm = 0.00163 m

Then, we can calculate the cross-sectional area of the wire:

A = πd2/4 = 2.08×10−6 m2

Now we can plug in the values and solve for R:

R = (1.68×10−8)(29.0)/2.08×10−6 = 0.026 ohms

To calculate the change in voltage from one end of the wire to the other end, we can use Ohm's law:

V = IR

where V is the voltage in volts, I is the current in amperes, and R is the resistance in ohms.

Plugging in the values, we get:

V = (15.0)(0.026) = 0.39 volts

Therefore, the change in voltage from one end of the wire to the other end is approximately 0.39 volts.

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You throw a ball straight up. Compare the sign of the work done by gravity while the ball goes up with the sign of the work done by gravity while it goes down.
a) Work is + on the way up and + on the way down
b) Work is + on the way up and - on the way down
c) Work is - on the way up and + on the way down
d) Work is - on the way up and - on the way down

Answers

Answer:

Work is negative on the way up and positive on the way down.

Explanation:

Work is positive if displacement and the force are in the same direction.

Work is negative if displacement and the force are in opposite directions.

(Note that work is zero if displacement is perpendicular to the force.)

In this question, the gravity on the object points downwards at all times.

On the way up, the position of the object is above where it was launched. Hence, displacement would point upwards.

Since the direction of gravity is opposite to that of displacement on the way up, the work on the object would be negative.

In contrast, displacement of the object points downward on the way down. Since displacement is in the same direction as the force of gravity, the work on the object would be positive.

a spacecraft is in a circular orbit of mars at an altitude of 200 km. calculate its speed and its perio

Answers

The speed of the spacecraft in a circular orbit around Mars at an altitude of 200 km is approximately 3,543.62 m/s, and the period of the orbit is approximately 6,867.97 seconds or 1.91 hours.

To calculate the speed of a spacecraft orbiting Mars in a circular orbit, use the formula: v = √(GM/R)

Where: v = speed of the spacecraft in meters per second

G = gravitational constant 6.674 × 10⁻¹¹ N m²/kg²

M = mass of Mars (6.39 × 10²³ kg)

R = radius of the orbit (200 km + the radius of Mars, 3,389 km)

Substituting in the values, we get:

v = √((6.674 × 10⁻¹¹ N m²/kg²) × (6.39 × 10²³ kg) / (3.5895 × 10⁶ m))

v ≈ 3,543.62 m/s

Therefore, the speed of the spacecraft in a circular orbit around Mars at an altitude of 200 km is approximately 3,543.62 m/s.

The formula to calculate the period of a circular orbit is T = 2πR/v

Where: T = period of the orbit in seconds

R = radius of the orbit in meters (200 km + 3389.5 km = 3589.5 km = 3.5895 × 10⁶ m)

v = speed of the spacecraft in meters per second

Plugging in the values, we get:

T = 2π(3.5895 × 10⁶ m) / (3,543.62 m/s)

T ≈ 6,867.97 seconds

The period of the orbit is approximately 6,867.97 seconds or 1.91 hours.

Therefore, the speed of the spacecraft in the circular orbit is 3,584 m/s and the period of the orbit is 6,867.97 seconds.

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which phenomenon causes precipitation to reach earth?

Answers

"Precipitation occurs due to condensation of water molecules in the air into droplets and they fall to the ground due to gravity."

One of the stages of the water cycle is precipitation. Clouds are areas of the sky with enough water content for drops to condense, and they are where precipitation originates. Therefore, precipitation follows mist. Although clouds are the source of all precipitation, not all clouds generate precipitation.

When cloud droplets or crystals become too dense to continue floating in the atmosphere, precipitation starts to descend from the clouds. If droplets do not become sufficiently dense, precipitation will not occur, and if the cloud is sufficiently heated by the Sun, it may even disperse. But for there to be a place for precipitation to come from, clouds do need to develop.

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The tires of a car make 95 revolutions as the car reduces its speed uniformly 95 km/h to 55 km/h. The tires have a diameter of 0.80 m. (a) what was the angular acceleration of the tires? If the car continues to decelerate at this rate, (b) how much more time is required for it to stop, and (c) how far does it go?

Answers

(a) Angular acceleration of the tyres= 7.3 rad/s^2

(b) Time required to stop= 8.9 s

(c) Distance travelled= 492.5 m

The angular acceleration of the tires can be calculated by using the following equation:

Angular acceleration = (Change in angular velocity)/(time).

Using the given information, we can calculate the angular acceleration as follows:

Angular velocity = (95 revolutions)/(95 km/h)
Time = (95 km/h - 55 km/h)/(95 km/h)
Angular acceleration = (95 revolutions)/(Time x 0.80 m)
Angular acceleration = 7.3 rad/s^2

For part b, the amount of time required for the car to stop can be calculated as follows:

Time = (55 km/h)/(7.3 rad/s^2 x 0.80 m)
Time = 8.9 s

For part c, the distance the car travels can be calculated as follows:

Distance = (55 km/h x 8.9 s)
Distance = 492.5 m

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hydroelectric dams generate electricity by question 20 options: a. using the energy of the river to produce steam. b. using run-of-the-river systems, in which turbines are placed into the natural water flow. c. water impoundment, in which dam operators control the rate of water flow to turbines. d. using generators that are placed on the bottom of a river. e. converting the kinetic energy of the water impounded behind a dam into potential energy.

Answers

Hydroelectric dams generate electricity through water impoundment, in which dam operators control the rate of water flow to turbines.

c is the correct option.

Hydroelectric dams are dams used to produce electricity. The movement of water drives turbines, which power generators that generate electricity.

The movement of water, generated by gravity, is what drives turbines. Hydroelectric dams are the most widely used renewable energy source, accounting for approximately 16% of global electricity production.

Hydroelectric dams generate electricity through water impoundment, in which dam operators control the rate of water flow to turbines.

This is the process of using turbines that are powered by the movement of water that has been dammed to generate electricity.

Turbines are powered by water that has been dammed to generate electricity, which is then sent to a power station to be used.

The electricity generated from hydroelectric dams is clean and safe, making it an important part of the renewable energy mix. They are also an essential part of the global infrastructure because they provide reliable, low-cost power.

They also assist in the management of rivers, flood control, and irrigation systems in various parts of the world.

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a circuit with a ba[ery and a variable resistor is near a loop of wire as shown. when the resistance r is decreased, the induced current in the loop is

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The current in the battery increases and the magnetic field generated is stronger, which causes a larger induced current in the wire loop. This current will also be in the opposite direction of the battery current.

A circuit with a battery and a variable resistor near a loop of wire will cause an induced current in the loop when the resistance of the resistor is decreased. This is known as electromagnetic induction, which occurs when the current in the loop of wire changes, generating a changing magnetic field. This magnetic field then causes a current in the nearby wire loop. In this case, when the resistance of the resistor is decreased,

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a 3 3-inch candle burns down in 12 hours. if b represents how much of the candle, in inches, has burned away at any time given in hours, t, write a proportional equation for b in terms of t that matches the context.

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The proportional equation that matches the context of a 33-inch candle burning down in 12 hours is b = 2.75t.

A candle that is 33 inches long is called a 33-inch candle. Candles are a popular decorative item that is commonly used for lighting, as decoration for weddings, and parties, or to create an aromatic atmosphere. B represents the length of the candle that has burned away at any time given in hours, t.

To find the proportional equation for b in terms of t that matches the context of a 33-inch candle burning down in 12 hours, the following steps should be followed:

Identify the given informationThe length of the candle (l) = 33 inchesThe time taken for the candle to burn down (t) = 12 hours

Determine the rate of burning The rate of burning of the candle is given by l/t. Therefore, the rate of burning = 33/12 = 2.75 inches per hour.

The proportional equation for b in terms of t is given by b = rt where r is the rate of burning. Therefore, b = 2.75t.

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a ball is thrown upward in the air, and its height above the ground after seconds is feet. find the time when the ball will be traveling downward at feet per second.

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The time required for the ball to travel downward at the feet per second will be 32 feet per second will be 1.5 seconds.

What is the time required by ball?

The ball is thrown upward in the air, and its height above the ground after seconds is feet. To find the time when the ball will be traveling downward at feet per second. In order to find the time when the ball will be traveling downward at feet per second, it is required to find the velocity of the ball when it reaches the maximum height.

In order to find the velocity, we need to differentiate the given function of height with respect to time. Now let's differentiate the given function of height with respect to time. Differentiating the function of height with respect to time, we get:

h(t) = -16t² + 48t + 64 = -16(t - 3)² + 160

Differentiating h(t) with respect to time, we get:

h(t) = -32t + 48

We know that the ball is thrown upward, so the initial velocity is 48 feet per second, and the acceleration is -32 feet per second per second. The ball is at maximum height when the velocity becomes 0.

So,

0 = -32t + 48

32t = 48

t = 1.5 seconds

Hence, the time when the ball will be traveling downward at 32 feet per second is 1.5 seconds.

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If I heated up a glass of 100 grams of water, and the temperature changed from 25℃ to 31℃, how much heat was needed to do that (in calories)?

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Answer:

6° because some heat is released out of surrounding. if 100 over six which is equal to sixtenn point four

Help would be greatly appreciated!

Answers

Answer:

V = X i + Y j        expression of vector in terms of unit vectors i andj

V = 12.0 i + 9.00 j

V = (12.0^2 + 9.00^2)^1/2 = 15.0      magnitude of resultant vector

Note this is a multiple of a 3, 4, 5 right triangle

5 is the magnitude of a 3, 4, 5 right triangle the given vector is 3X the 3, 4, 5 triangle or 15

Find the value of x. Round the length to the nearest tenth.

Answers

Answer:

well first u divide the numbers

Determine the power of water transferred each hour through the dam. 500 m² are cleared every hour. The height of the dam is 500m.​

Answers

Answer:

The power of water transferred each hour through a 500m high dam if 500m² are cleared every hour is approximately 4.41 GW

Explanation:

To answer this question, we need to know the density of water, the gravitational acceleration, and the efficiency of the dam. Let's assume that the density of water is 1000 kg/m³, the gravitational acceleration is 9.81 m/s², and the efficiency of the dam is 100%.

The power of water transferred each hour through the dam is given by the formula:

Power = Flow rate x Density x Gravity x Height x Efficiency

where Flow rate is the volume of water that passes through the dam each second, Density is the density of water, Gravity is the gravitational acceleration, Height is the height of the dam, and Efficiency is the efficiency of the dam.

First, let's calculate the flow rate:

Flow rate = Area x Velocity

where Area is the cleared area of 500m² and Velocity is the speed of water passing through the dam.

Assuming that the water is moving at a constant speed, we can use the formula:

Velocity = Height / Time

where Time is the time it takes for the water to pass through the dam.

Since the height of the dam is 500m and we want to know the power transferred each hour, we can convert the time to seconds as follows:

Time = 1 hour / 3600 seconds per hour = 0.000277778 hours

So, the velocity of the water is:

Velocity = 500m / 0.000277778 hours = 1,800,000 m/s

Now we can calculate the flow rate:

Flow rate = 500m² x 1,800,000 m/s = 900,000 m³/s

Finally, we can calculate the power of water transferred each hour through the dam:

Power = Flow rate x Density x Gravity x Height x Efficiency

Power = 900,000 m³/s x 1000 kg/m³ x 9.81 m/s² x 500m x 1

Power = 4,405,500,000 watts or approximately 4.41 GW

Therefore, the power of water transferred each hour through a 500m high dam if 500m² are cleared every hour is approximately 4.41 GW.

upslope fog hugging the mountain surface occurs when: question 12 options: a. air warms because of decreasing atmospheric pressure
b. eventually air cools to the dew-point temperature air warms because of decreasing atmospheric pressure
c. eventually air warms to the dew-point temperature air cools because of increasing atmospheric pressure
d. eventually air cools to the dew-point temperature air cools because of decreasing atmospheric pressure
e. eventually air cools to the dew-point temperature

Answers

A decrease in atmospheric pressure eventually causes air to cool to the dew-point temperature.

How does surface-hugging upslope fog on mountains occur?

Fog on an upward slope forms adiabatically. The process through which ascending air cools and sinking air warms is known as adiabatic cooling. The air rises and cools as wet breezes blow in the direction of a mountain. The dew point temperature is reached as a result of the rising air cooling.

Upslope fog: what is it?

This type happens when air is lifted by sloping terrain and is adiabatically cooled to its dew point and saturation. Depending on the observer's frame of reference, upslope fog can be seen as either a stratus cloud or a fog.

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An object is released from rest a height h above the ground. A second object with four times the mass of the first if released from the same height the potential energy of the second object compared to the first is a. four times moors. b. twice as much. c. the same d. sixteen times more.

Answers

Answer:

A. Four times

Explanation:

Gravitational Potential Energy (PE) is given as PE=mass*gravity*height

setting the equations of potential energy equal to each other for each object you get

m1gh=m2gh

then you can cancel out the gravity and height and get

m1=m2

then we know the mass of the second object is 4 times the mass of the first object so

m2=4m1

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