4 years ago

A car has a mass of 2,000kg and is traveling at 28 meters per second what is the car's kinetic energy

Physics

1 answer:

timama [110]4 years ago

6 0

284000 joules

is the answer.

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If the atomic number of an element is 26, then what else is also 26?

Pachacha [2.7K]

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Explanation:

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3 years ago

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A(n) 69.8 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 60.4 m away from the shuttle

alukav5142 [94]

Answer:

The time taken is 6.7 min

Explanation:

Using the linear momentum conservation theorem, we have:

$m_1*v_{o1}+m_2*v_{o2}=m_1*v_{f1}+m_2*v_{f2}$

when she was 60.4m from the shuttle, she has zero speed, so the initial velocity is zero.

$m_1*0+m_2*0=m_1*v_{f1}+m_2*v_{f2}\\m_1*_{f1}=-m_2*v_{f2}\\v_{f1}=-\frac{m_2*v_{f2}}{m_1}\\\\v_{f1}=-\frac{0.886kg*12m/s}{69.8kg}\\\\V_{f1}=-0.15m/s$

That is 0.15m/s in the opposite direction of the camera.

the time taken to get to the shuttle is given by:

$t=\frac{d}{v_{f1}}\\\\t=\frac{60.4m}{0.15m/s}\\\\t=403s\\t_{min}=403s*\frac{1min}{60s}=6.7min$

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3 years ago

Write down the SI unit of length and mass

Vanyuwa [196]

Answer:

The SI unit for length is meters(m), for mass is kilograms(kg)

Explanation:

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3 years ago

Velocity requires speed and?

Nonamiya [84]

Answer:

I think it's acceleration.

Explanation:

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3 years ago

Which process produces the energy radiated by the star when it becomes a main sequence star?

inysia [295]

The process that produces the energy radiated by stars is nuclear fusion in the core.
For a star on the main sequence, it's the fusion of hydrogen nuclei into helium.

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4 years ago