Answer: 258.3 s
Explanation:
The speed
is given by the following equation:

Where:
is the speed of light in vacuum
is the double of the distance between Earth and Moon, since the beam of light travels from Earth to the Moon and back to Earth again.
is the time it takes to the beam of light to travel the mentioned distance
Isolating
and solving with the given information:


Finally:

I think the correct answer from the choices listed above is the second option. The thermosphere has less air pressure than the mesosphere <span>because the farther away you are from the surface of the earth the lesser amount of gases present.</span>
Answer:
1547.6 J
Explanation:
From the law of conservation of energy, the sum of initial and final energy is the same. Energy can only be transformed into other forms but can't be created nor lost
Initial kinetic energy of the hammer system is given by
where m is mass of the body and v is the velocity
Substituting m for mass of hammer which is 2.44 Kg and v for 62 m/s

Since the hammer comes to rest, the final kinetic energy is zero since it's velocity is zero

Change in kinetic energy is given by
hence 0-4689.68 J=-4689.68 J
Change in total internal energy is given by
and in this case the change in potential energy is zero

Since only 0.33 of this energy is converted hence

I’m sorry I wish I knew the answer but I don’t I need this for points I’m so sorry