On the Moon, the hammer and the feather landed at the same time because: A. The Moon has less gravity than Earth.
B. There is no air resistance on the Moon.
C. The astronaut dropped them at different times.

Calculate the number of moles of ethane in 100 grams

3. how much energy in joules is required to evaporate .0005 kg of liquid ammonia to vapor at the same temperature? 4. how much energy ( in megajoules ) is given up by .75 kg of water at 0c when it freezes to form ice at 0c? 5. explain how heat works between and at critical temperatures?

Stage in which a typical star has completely stopped fusion