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melisa1 [442]
3 years ago
13

A boulder on top of a cliff has a potential energy of 12400J. How high above is the boulder?

Physics
1 answer:
Bezzdna [24]3 years ago
6 0
Do you also know what the mass of the boulder is?
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Definition: This is a drawing showing the direction and magnitude of all forces acting on a body.
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Answer:

Free body diagram

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How much current does it take to paralyze your muscles?​
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A bicycle has a momentum of 36 kg* m/s and a very!I city of 4 m/s.What is the mass of the bicycle?
Strike441 [17]

p = 36 kgm/s

v = 4m/s

we know that,

p = mv

so,

m =  \frac{p}{v}

m  =  \frac{36}{4}

m = 9kg

8 0
3 years ago
What do psychologist investigate
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7 0
3 years ago
Read 2 more answers
Earth's neighboring galaxy, the Andromeda Galaxy, is a distance of 2.54×10^7 light-years from Earth. If the lifetime of a human
kupik [55]

Answer:

0.9999986*c

Explanation:

The ship would travel 2.54*10^7 light years, which means that at a speed close to the speed of light the trip would take 2.54*10^7 years from the point of view of an observer on Earth. However from the point of view of a passenger of that ship it will take only 70 years if the speed is close enough to the speed of light.

\Delta t = \Delta t' * \sqrt{1 - (\frac{v}{c})^2}

Where

Δt is the travel time as seen by a passenger

Δt' is the travel time as seen by someone on Earth

v is the speed of the ship

c is the speed of light in vacuum

We can replace the fraction v/c with x

\Delta t = \Delta t' * \sqrt{1 - x^2}

\sqrt{1 - x^2} = \frac{\Delta t}{\Delta t'}

1 - x^2 = (\frac{\Delta t}{\Delta t'})^2

x^2 = 1 - (\frac{\Delta t}{\Delta t'})^2

x = \sqrt{1 - (\frac{\Delta t}{\Delta t'})^2}

x = \sqrt{1 - (\frac{70}{2.54*10^7})^2} = 0.9999986

It would need to travel at 0.9999986*c

5 0
3 years ago
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