Answer:
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Explanation:
Which value is equivalent to 178 centimeters?
A.
1.78 millimeters
B.
17.8 millimeters
C.
1.78 meters
D.
1.78 × 10-2 micrometers
E.
1.78 × 10-5 kilometers
Answer: The answer is C.
Explanation: 1 centimeter is equal to 0.01 of a meter and 178 centimeters times 0.01 is 1.78 meters, Hope that helps
A _____ is a model of an atom in which each dot represents a valence electron
Answer:
electron dot diagram is the answer to your question.
Complete the statement by filling in the Blanks:
In this experiment, the (Blank) was intentionally manipulated. This was the independent variable. The dependent variable measured was the (Blank).
Options for the Blanks:
- Induced Current
- Magnet Polarity
- Magnet Strength
Answer:
induced current
Explanation:
intentionally manipulated.
Answer:
1. Magnet Polarity 2.Induced Current
Explanation:
Like the guy above said
What planet has an eleven hundred degree difference from one side to the other.
plz help i have an exam and i dont understand this
A body initially moving at a constant speed is brought to rest at a uniform rate. Which of the speed time graphs below indicate the motion of the body? *
2 points
Answer:
Graph B
Explanation:
Graph B represents the motion of the body as the body moves at a speed first this show the rise in speed. And then it's comes to rest where time is constant the speed drops down and the body comes to rest...
What is the difference between the mass
number and atomic numberof an atom
what happen to the orbital period if the mass of satellite increases ?
Answer:
if the satellite mass increases nothing will happen to the orbital spèriod because mesosphere burn the satellite
how can you reduce output voltage to 6v in transformers if the input voltage is 240v
Answer:
[tex]N_P = 40\ N_S[/tex]
To reduce the output voltage to 6v in transformers if the input voltage is 240v, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.
Explanation:
The change in voltage of a transformer depends upon the turns ratio of the transformer between secondary and primary coil. Following formula can be used to determine the turns ratio in this case:
[tex]\frac{N_P}{N_S} = \frac{V_P}{V_S} \\\\[/tex]
where,
[tex]N_P[/tex] = No. of turns in the primary coil
[tex]N_S[/tex] = No. of turns in the secondary coil
[tex]V_P[/tex] = voltage in the primary coil = 240 V
[tex]V_S[/tex] = voltage in the secondary coil = 6 V
Therefore,
[tex]\frac{N_P}{N_S} = \frac{240\ V}{6\ V} \\\\N_P = 40\ N_S[/tex]
To reduce the output voltage to 6v in transformers if the input voltage is 240v, we need to have 40 times as many turns in the primary coil as there are in the secondary coil.
give reason for the following observation
The smell of hot sizzling food reaches you several metres away but to get the smell from cold food you have to go close.
Answer: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close because the kinetic energy of the particles of matter increases with the increase in temperature. In cold foods, kinetic energy is less while in hot foods, kinetic energy is more
hope this helps
Smell spreads due to diffusion. In hot food the molecules have a lot of kinetic energy , and they therefore spread fast , whereas in cold food the kinetic energy of the molecules are less and they don't spread far.
A large box of mass 4kg slides across a frictionless surface with a velocity of 12m/s to the right. It collides with a smaller box of mass 2kg that is stationary. The boxes stick together. What is the velocity of the two combined masses after the collision.
Answer:
Explanation:
Let's call the large box "1" and the smaller box "2". The equation for this works so that momentum is conserved, as the Law states.
[tex][(m_1v_1+m_2v_2)]_b=[m_1+m_2)v]_a[/tex] That says that the momentum of the larger box plus the momentum of the smaller box before the collision has to equal the momentum of the combined masses since they stick together. Filling in:
[(4(12) + 2(0)] = [(4 + 2)v] and
48 + 0 = 6v so
v = 8 m/s to the right
Lucas pushes on a car stuck in a ditch with a force of 1000 N for 15 minutes. The car remains stuck. How much work did Lucas do?
Your answer:
O 66.7)
0 0
o 1.22)
O 22,000
Answer:
I think it would be the second answer...
Explanation:
Hope this helps!
Lucas do a work of 0 joule. Hence, option (B) is correct.
What is work?The notion of work in science is significantly different from what it is understood to entail in ordinary life. Every time work is performed, energy is transmitted, as shown by the definition of work in physics.
A force must be applied and there must be movement in the force's direction for a work to be completed scientifically. Having said that, we may state that The product of the component of the force acting in the displacement's direction and its magnitude is work.
Mathematically work done can be expressed as:
work done = force × displacement × cosθ
Where θ is the angle between the force and the displacement .
Here, the car remains stuck, that means, no displacement happens. So. Lucas do a work of 0 joule.
Learn more about work here:
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Si un automóvil logra una potencia util promedio de 250kw y se sabe que tiene un rendimiento energético del 25%. ¿Cuanta energia total consume en 1 min? Exprese el resultado en kj
Answer:
W = 3.75 kJ
Explanation:
Power is defined by the relational
P = W / t
W = P t
the yield is 25% = 0.25
W = 0.25 Wo
W = 0.25 250 60
W = 3750 J
W = 3.75 kJ
Does applying force on a body mean that it has to become faster or
slower?? Explain on the basis of circular motion
Answer:
it means it will become faster because more force are applied. This means that if you get pushed, the harder you are pushed, the faster you'll move (accelerate). The bigger you are, the slower you'll move.
hope this helps bby<3
a hotgas is injected into at engine at 573 k and exhausts at 343 k. what is the highest efficiency of thisengine?
Answer:
230k
Explanation:
energy capacity maximum is 573 total available. 343k of that energy is present at release and subsequent loss leaving max used energy of 230k.
The same wave travels for 2 seconds, what is its frequency?*
Answer:
In waves distance is measured by wave length and time is measured by frequency or period.
velocity ratio=wave length multiply by frequency.
HENCE, if the same wave travels for 2 econds its frequency will be 2Hz.
Explanation:
A system engine generating 5 hp is raising a load weighting 2000 lb. How high will the load be raised in 10s?
Answer:
h = 44.5 m
Explanation:
Given that,
Power of the engine, P = 5 hP = 3728.5 W
Weight of the load, W = 2000 lb = 8900 kg
We need to find how high the load be raised in 10 s.
We know that,
Power, [tex]P=\dfrac{W}{t}[/tex]
Where
W is work done
Also,
1 Pound = 4.45 newtons earth (N)
[tex]P=\dfrac{F\times h}{t}\\\\h=\dfrac{Pt}{F}\\\\h=\dfrac{8900\times 10}{2000}\\\\h=44.5\ m[/tex]
So, the height raised by the load is 44.5 m.
For every action, there is an equal and opposite reaction.
Does the statement describe a scientific law?
Answer:
This is newton's 3rd law
Explanation:
A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?
heating it to find the temperature at which it melts
exposing it to a flame to see if it catches on fire
hitting it with a hammer to determine if it breaks or bends
placing it in water to find out whether or not it dissolves
Answer:
hitting it with a hammer to determine if it breaks or bends
Answer:
exposing it to a flame to see if it catches on fire
Explanation:
A chemical property is when the matter changes into a different substance. This is true when you expose it to a flame because if a substance is burned, it will change into a new substance. All the other options are examples of physical changes.
-I also took the quiz and got 100%
Hope this helps!
A ball is thrown straight up with a speed of 30 m/s, and air resistance is negligible. How long does it take the ball to reach the maximum height?
Answer:
3 seconds
Explanation:
Applying,
Applying,
v = u±gt................ Equation 1
Where v = final velocity, u = initial velocity, t = time, g = acceleration due to gravity.
From the question,
Given: v = 0 m/s ( at the maximum height), u = 30 m/s
Constant: g = -10 m/s
Substitute these values into equation 1
0 = 30-10t
10t = 30
t = 30/10
t = 3 seconds
What is the mass of an object if a net force of 18 N causes it to accelerate at 15 m/s^2?
Answer:
1.2 kg
Explanation:
F = 18N
a = 15 m/s^2
F = ma
18 = 15m
m = 1.2 kg
I need help pleaseee
Answer:
a refraction
b reflection
creflection
d refraction
brainliest plzz
Sound travels slowest through gases _____________________. Group of answer choices because the molecules of gas are close together because gases are air because the molecules of gas are far apart because gases have the lowest temperature
Which of these historical events led to a major imbalance in the carbon cycle?
A. American Revolution
B. American Civil War
C. The Industrial Revolution
D. The Renaissance
Answer:
C
Explanation:
I think it's industrial revolution because many industries were developed which emitted a lot of carbon gases in the atmosphere.
The Industrial Revolution events led to a major imbalance in the carbon cycle. The correct option is C.
What is Industrial Revolution?The Industrial Revolution, which began in the late 18th century and continued through the 19th century, led to a major increase in the burning of fossil fuels such as coal, oil, and gas. This led to a significant increase in carbon emissions and a disruption of the natural carbon cycle.
Prior to the Industrial Revolution, the carbon cycle was relatively balanced, with carbon being naturally cycled through the atmosphere, oceans, plants, and animals. However, the burning of fossil fuels has released large amounts of carbon dioxide(CO₂) into the atmosphere, which has led to an increase in atmospheric carbon dioxide(CO₂) levels and contributed to global warming and climate change.
Other historical events such as the American Revolution, American Civil War, and the Renaissance did not have a significant impact on the carbon cycle in the same way that the Industrial Revolution did.
Therefore, The correct answer is C i.eThe Industrial Revolution.
To learn more about global warming click:
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The total momentum before a collision is___to the total momentum after a collision
Answer:
Equal
Explanation:
The law of conservation of energy states that the total momentum before and after a collision are equal
Answer:
Equal to the total momentum of the two objects after the collision.
Pascal in term fundamental unit is?
Answer: SI unit of pressure
Explanation: The pascal (pronounced pass-KAL and abbreviated Pa) is the unit of pressure or stress in the International System of Units (SI). Reduced to base units in SI, one pascal is one kilogram per meter per second squared; that is, 1 Pa = 1 kg · m-1 · s-2.
Hope this helps! Have a fantastic rest of ur day, luv!
PLEASE HELP ME AND REALLY NEED THIS ANSWER QUIKLY
A student starts a stopwatch when a bob reaches to point M.he counts each time when the bob changes direction and stops the watch on th tenth change in direction . the watch shows a time of 12.0 second . calculate the time period.
please help me with the question!!
Answer:
the time period is 14.00
Explanation:
it.answer help you
In the example given below, Aaron applies a force of 300N and Bob applies a force of 450N :
A) calculate the total anti-clockwise moment
B) calculate total clockwise moment
C) Is this system in equilibrium? What will happen to the see saw?
D) Where would Bob have to stand in order to balance the see saw
Answer:
Explanation:
This problem is all about torque. The "rules" are that in order for a system to be in rotational equilibrium, the sum of the torques on the system have to equal 0 (in other words, they have to equal each other {cancel each other out}). The equation for torque is
τ = F⊥r where τ is torque, F⊥ is the perpendicular force, and r is the lever arm length in meters. We also have to understand that in general Forces moving clockwise are negative and Forces moving counterclockwise are positive. Now we're ready for the problem:
A. The counterclockwise torque:
τ = 300(3) so
τ = 900N*m
B. The clockwise torque:
τ = -450(2.5) so
τ = -1100N*m
C. Obviously the system is not in roational equilibrium because one side is experiencing a greater torque than the other. This system will move clockwise as it currently exists.
D. In order for the system to be in rotational equilibrium, we have to move Bob's location from the fulcrum. Let's see to where.
The torques have to be the same on both sides of the fulcrum; mathematically, that looks like this:
F⊥r = F⊥r Filling in:
300(3) = 450r and
900 = 450r so
2 = r. This means that Bob will have to move closer to the fulcrum by a half of a meter to 2 meters from the fulcrum in order for the system to be in balance.
Isn't this so much fun?!
A wave with a frequency of 70.0 Hz travels through rubber with a wavelength of 0.80 m. What is the velocity of the wave?
Explanation:
everything can be found in the picture
which level of the energy pyramid contains the most energy
Answer:
lowest level contains more energy
Explanation:
2. El edificio Platinum, ubicado en Santiago, se mece con una frecuencia aproximada a 0,10 Hz. ¿Cuál es el periodo de la vibración?
Answer:
10 segundos.
Explanation:
Primero sabemos que la unidad Hz es equivalente a uno sobre segundo, entonces:
1 Hz = 1 s^-1
Lego sabemos que la relación entre frecuencia f y periodo T es:
T = 1/f
Entonces el periodo es la inversa de la frecuencia.
Si en este caso sabemos que la frecuencia es 0.10 Hz, tenemos:
f = 0.10 Hz = 0.10 s^-1
Entonces el periodo sera:
T = 1/f = 1/(0.10 s^-1) = (1/0.10) s = 10 s
Esto significa que una vibración completa le toma 10 segundos.
