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3 years ago

Ultraviolet rays from the sun are able to reach Earth's surface because-

Physics

1 answer:

Leona [35]3 years ago

7 0

The answer to this is C.

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If a proton were released in the electric field above, what direction would it move?

Afina-wow [57]

Answer:

d because the proton would move towards the negative plate

Explanation:

5 0

3 years ago

Look at the velocity versus time graph below. What is the magnitude of the displacement of the object after it travels for three

Elza [17]

Answer:

C. 12m

Explanation:

$veocity = \frac{displacement}{time}$

from the graph v = 4m/s and t = 3 s

d = vt = 4 × 3 = 12 m

5 0

3 years ago

3. A 40.0-kg wagon is towed up a hill inclined at 18.5 with respect to the horizontal. The tow rope is parallel to the incline a

inn [45]

Force=tension-fg sin ∅
=140-mg sin 18.5
=140-124.35
=15.62N

a=f/m=15.62/40=0.39
now,
v²=u²+2as
=2×0.39×80
v²=62.4
v=7.8m/s

4 0

3 years ago

What are 2 ways the velocity of an object can be changed

kvasek [131]

Velocity can change when there is a change in direction and speed.

8 0

3 years ago

Read 2 more answers

Stunt car A and stunt car B are identical cars with the same mass of 35.9 kg. They are both traveling at 37.1 m/s. Stunt car A c

frez [133]

Answer:

<h2>Stunt car A and stunt car B are identical cars with the same mass of 35.9 kg. They are both traveling at 37.1 m/s. Stunt car A crashes into a hard concrete wall, whereas stunt car B crashes into a big soft mattress. They both come to a complete stop after the impact.Stunt Car A experiences a LARGE FORCE over a SHORT PERIOD of time. Stunt Car B experiences a SMALL FORCE over a LONG PERIOD of time. Because of the force experienced by Stunt Car A, it will sustain MORE damage than Stunt Car B.</h2>

Explanation:

As we know that force is given as rate of change in momentum

so it is defined as

$F = \frac{dP}{dt}$

so here we know that both the cars are identical and both are moving with same speed so after coming to rest both the cars have same change in momentum

while Car A will experience more force because due to collision with concrete wall the time of collision is very small as compared to Car B

So Force on Car A is more than the force on Car B

8 0

3 years ago