Answer:
500
Equation used:
(1/2 * 250kg) * 2 m/s^2
Hope i'm right
A car is travelling along the road where the speed limit is 30 mph. A speed detector measures it speed as 15 m/s. Use this fact to work out whether or not the car is breaking the speed limit: there are 1609 m in a mile
Answer:
The speed of the car is in from as the required speed limit on the road.
Explanation:
The speed limit on the road is 30 miles per hour.
Given that: 1 mile = 1609 m
Also,
60 second = 1 minutes
60 minutes = 1 hour
Then,
30 miles per hour = [tex]\frac{30 *1609}{60*60}[/tex]
= [tex]\frac{48270}{3600}[/tex]
= 13.4083
30 miles per hour = 13.41 m/s
The speed measured by the detector is 15 m/s which is not accurate. Therefore, the car was moving at the required speed limit. The speed of the car is lesser than that measured by the detector. Thus no offence has been committed by the driver.
Which is true of the greenhouse effect?
A. It is purely a manmade phenomenon.
B. it does not involve carbon dioxide.
C. It causes cooling of Earth's atmosphere.
C. it traps thermal energy from the Sun.
Answer:
c is correct option thanks to brainly
How do I calculate how many meters are in 7.2 light years?
The exact question is:
Calculate in meters the distance between a galaxy and the Earth if the distance is equal to 7.2 light years.
Answer:
68.2 Quadrillion meters
Explanation:
A lightyear is the distance that light travels in one year.
Speed of light is [tex]3*10^8\ m/s[/tex]
So light covers 300,000,000 meters in one second.
One year has 31536000 seconds so , light covers
[tex]9.461*10^{15}\ meters\ in\ one\ year[/tex]
so 7.2 light years is
[tex]7.2*(9.461*10^{15})\\6.82*10^{16}[/tex]
so 7.2 light years is
6.82 x 10^(16) meters or
68.2 Quadrillion meters
Question 2 of 25
What is the voltage drop across the 20 resistor?
10.00
120.0 V
20.0 2.
www
30.02
The voltage drop across the 20 Ohm resistor is 40V.
To determine the answer, we need to know about the current flowing through the resistor.
What is the total resistance of the circuit?As the three resistors are connected in series, so the resultant resistance is
10 Ohmv+ 20 Ohm + 30 Ohm = 60 Ohm
What is the current flowing through the resistors?As these resistors are connected in series, so the amount of current flowing through each resistor is equal.According to Ohm's law, current = voltage/resistanceCurrent= 120/60 = 2 A
What is the voltage across the 20 Ohm resistor?According to Ohm's law, voltage across the 20 Ohm resistor
= current×resistance
= 2×20
= 40volt
Thus, we can conclude that the voltage across the 20 Ohm resistor is 40V.
Learn more about Ohm's law here:
brainly.com/question/14296509
#SPJ2
HELP ASAP !
Which of the following situations would result in no work done by the force indicated?
a
The object undergoes only a slight displacement while the force is acting on it.
b
The force is perpendicular to the displacement of the object.
c
The force is not completely parallel to the displacement of the object
d
All of the above result in no work done by the force indicated.
Answer:
b The force is perpendicular to the displacement of the object.
Explanation:
Work is done when a force is applied on a body causing it to move in a particular direction.
Work done = Force x displacement
For work to be done, a force must applied on a body to move it through a specific distance in direction.
When force is perpendicular to the displacement of the object, the component vector resolution is 0 and the work done is 0.
When one wave crest overlaps the crest of another and they add together what happens to the amplitude?
A: stays the same
B: decreases
C: increases
When one wave crest overlaps with the crest of another and they add together and their amplitude increases. Hence, C is correct.
What is amplitude ?Amplitude of a wave is the distance from the midpoint of a crest to its top or the distance from the midpoint of a trough to its bottom. For a wave the peak to the top is called crest and peak to the bottom or decline is called troughs.
When two waves overlap by crest of one wave and trough of another wave, then their amplitude will decrease and it is called destructive interference.
Amplitude of a wave is directly related to its intensity. High amplitude waves are intense. When two waves overlaps by their crests and add up together their amplitude will be the sum of amplitudes of both waves. This is called constructive interference. Hence, option C is correct.
To find more on interference, refer here:
https://brainly.com/question/16098226
#SPJ2
is it possible that the existence of two different angle of incidence of a single angle of deviation
Answer:
Yes
Explanation:
It is possible that the existence of two different angle of incidence of a single angle of deviation.
This is possible according to the principle of the reversibility of light which explains its formed in a prism.
When a ray is incident on the first surface it then emerges out of the second surface and could allow another ray to be incident on second.
A Car accelerates from 4 m/s to 16 m/s in 4 seconds. What is the car's
acceleration?
O 12 m/s^2
3 m/s^2
4 m/s^2
O 1 m/s^2
Answer:
4 m/s^2
that is the right acceleretion a car
Answer:
I believe that the answer is 3 m/s^2
Explanation:
since acceleration is final velocity minus initial velocity divided by time, we can plug in known values and solve.
a=(f-i)/t
a=(16-4)/4
a=12/4
a=3
3m/s^2 is the acceleration
7. A 1000-kg car comes to a stop without skidding. The car's brakes do 50,000 J of work
to stop the car. Which of the following was the car's velocity when the brakes were
initially applied?
Answer:
10 m/s
Explanation:
Which pair of concurrent forces could produce a resultant force having a magnitude of 10. Newtons?
The pair of concurrent forces will be of 5 N to make the magnitude of net force as 10 N.
Given data:
The magnitude of resultant force is, [tex]F_{net}=10 \;\rm N[/tex].
The given problem is based on the concept of concurrent forces which says that, If the forces applied to a body are such that their lines of action meet at a single point, then they are called concurrent forces.
Now to obtain the value of concurrent forces, let us consider the forces F and F' to be acting along a linear direction. Such that the net force is given as,
[tex]F_{net}=F+F'[/tex]
Then for 10 N of net force, the pair of concurrent force is,
[tex]10=F+F'\\\\10=5+5\\\\10=10[/tex]
Thus, we conclude that the pair of concurrent forces will be of 5 N to make the magnitude of net force as 10 N.
Learn more about the concurrent force here:
https://brainly.com/question/2411525
If you add an additional neutron to an atomwhat do you create?
Answer:
However, if you add a thousand neutrons, you will be creating one super-radioactive atom. Neutrons play a major role in the mass and radioactive properties of atoms. You may have read the page on isotopes. Isotopes are created when you change the normal number of neutrons in an atom.
Explanation:
The neutron is a subatomic particle, symbol n or n⁰, which has a neutral (not positive or negative) charge and a mass slightly greater than that of a proton. Protons and neutrons constitute the nuclei of atoms. Since protons and neutrons behave similarly within the nucleus, and each has a mass of approximately one atomic mass unit, they are both referred to as nucleons. Their properties and interactions are described by nuclear physics.
what is the two kinds of solids in amorphous
Solids can be classified into two types: crystalline and amorphous. Crystalline solids are the most common type of solid. They are characterized by a regular crystalline organization of atoms that confer a long-range order. Amorphous, or non-crystalline, solids lack this long-range order.
9. An object moving at a constant velocity accelerates at a constant rate of 20 m/s for a distance of
100 m. At the end of the acceleration the object has a velocity of 80 m/s. What was its velocity
before accelerating?
Answer:
I believe the answer is roughly 49m/s
Explanation:
List all given variables:
Accel=20m/s^2
Dist=100m
Final velocity=80m/s
Initial velocity=?
Using the equation i=sqrt(f^2-2a*d) where i =initial velocity, f=final velocity, a=acceleration, and d=distance, we can plug in the known values and solve for initial velocity
i=sqrt(80^2-2*20*100)
i=sqrt(6400-4000)
i=sqrt(2400)
i=48.99, rounded up to 49m/s as the initial velocity
This is my speculation about this answer would appreciate if anyone can confirm this.
please help
exercising transforms the chemical energy in the food you eat into:
a. kinetic energy
b. potential energy
c. radiant energy
d. chemical energy
Answer:
Exerxingtransforms the chemical energy in the food you eat into Kinetic Energy.
Therefore, the answer is A. Kinetic Energy
If an object is moving at a constant velocity, it means that?
A 20 kg mass is hanging on one side of a pulley and a 5 kg mass is hanging on the other. Determine the acceleration of each mass.
Answer:
i believe it's 7
Explanation:
Which of the following is the keyboard shortcut for saving a document?
O Control V
O Control S
O Control A
O Control E
Answer:Control S, Command S on MAC=Save
Help me pretty please with a cherry on top!!
Answer:
A. im not for sure hope it helps
Explanation:
If a refrigerator draws about 0.5 amps when plugged into a 120 V wall outlet how much power (watts) does it use?
Answer:60 W
Explanation:
You are trying to climb a castle wall so, from the ground, you throw a hook with a rope attached to it at 24.1 m/s at an angle of 65.0° above the horizontal. If it hits the top of the wall at a speed of 16.3 m/s, how high is the wall?
Answer:
The value is [tex]h = 13.2 \ m[/tex]
Explanation:
From the question we are told that
The speed of the rope with hook is [tex]u = 24 .1 \ m/s[/tex]
The angle is [tex]\theta = 65.0^o[/tex]
The speed at which it hits top of the wall is [tex]v = 16.3 m/s[/tex]
Generally from kinematic equation we have that
[tex]v_y^2 = u_y ^2 + * 2 (-g)* h[/tex]
Here h is the height of the wall so
[tex][16.3 sin (65)]^2 = [24.1 sin (65)] ^2+ 2 (-9.8)* h[/tex]
=> [tex]h = 13.2 \ m[/tex]
What force would need to be added downwards to have this 2kg object accelerate at
5 m/s/s downward and 1.5 m/s/s to the left?
Answer:
Explanation:
Plz di all plz i will give brainest and thanks to best answer do it right
If you are sitting in a bus that is traveling along a straight, level road at 100 km/hr., you are traveling at 100 km/hr too. (a) If you hold an apple over your head, how fast is it moving relative to the road? (b) Relative to you? (c) If you drop the apple, does it still have the same horizontal motion? Explain.
What Law is it?
(a) The velocity of the apple with respect to the road is 100 km/h.
(b) The velocity of the apple with respect to you is 0 km/h.
(c) If you drop the apple the horizontal velocity will not change due to law of conservation of linear momentum.
What is the relative velocity of the apple?
The relative velocity of the apple placed over your with respect to the road is calculated as follows;
Velocity of the apple = 100 km/h
Velocity of the road = 0 km/h
Va/r = 100 km/h - 0 km/h
Va/r = 100 km/h
The velocity of the apple relative to you is calculated as follows;
your velocity = 100 km/h
velocity of the apple = 100 km/h
Va/y = 100 km/h - 100 km/h
va/y = 0 km/h
If you drop the apple, the horizontal velocity will remain the same, because gravity does not affect horizontal motion.
The law is law of conservation of linear momentum.
Learn more about relative velocity here: https://brainly.com/question/17228388
#SPJ1
What is the mass of 0.48 mol of cadmium, cd in grams.
Answer:
53.95g
Explanation:
Given parameters:
Number of moles = 0.48mol
Unknown:
Mass of cadmium = ?
Solution:
The number of moles, molar mass and mass of the atom is related by the expression;
Mass of Cd = number of moles x molar mass
Molar mass of Cd = 112.4g/mol
Now;
Mass of Cd = 0.48 x 112.4 = 53.95g
A rectangular block measures 4.1 cm by 2.8 cm by 2.1 cm.
Calculate its volume giving your answer to an appropriate
number of significant figures.
Answer:v=l x w x h
Explanation:
h=height
w=width
l=length
Answer:
24.108 cm3
Explanation:
4.1x2.8x2.1
24.108cm3
what is most likely being measured in the picture? A. the height of the cylinder.
B. the density of liquid.
C. the mass of th object.
D. the volume of the object
Answer: volume of an object???
Explanation:
A 10kg ball has a momentum of 40 kg.m/s. What is the ball’s speed.
Show the work and equations.
Answer:
4 m/sExplanation:
The speed of the ball can be found by using the formula
[tex]s= \frac{p}{m} \\ [/tex]
p is the momentum
m is the mass
From the question we have
[tex]v = \frac{40}{10} = 4 \\ [/tex]
We have the final answer as
4 m/sHope this helps you
A car with a mass of 1600 kg is towing a trailer with a mass of 420 kg. The car
provides a forward thrust of 3300 N. What is the acceleration of the trailer?
Answer:
1.63366
Explanation:
I got this answer from calculator soups physics calculators. I really recommend their website for formulas.
I need help with this can anybody help me
Explanation:
The problem here deals with relative dating of fossils in a stratigraphic column.
To solve this problem, we apply one of the rules of interpreting a session which is the principle of fossil and fauna succession:
"fossils and fauna in a geologic sequence succeed one another in a predictable way".
The oldest fossil is found in the oldest bed usually at the bottom of the sequence.
The youngest fossil is found at the top of the beds.
1. Oldest organism in the sequence;
Trilobite
2. Organism in the youngest layer;
Fern
3. Older organism between Crinoid and Ammonite;
Ammonite
The ammonite is below the crinoid in the sequence.
Should the resistance of an ammeter low or high ?give reason
Answer:
The resistance of an ammeter should be low. This is because an ammeter is connected in series with the circuit for the measurement of electric current. In case, its resistance is high, then some amount of current may lost in heating it leading to the inaccurate reading. An ideal ammeter is one which has zero resistance.
