What happens to a comet after it makes several trips around the sun

Gunpowder residue is most likely to show up where on a shooters hands

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

Me pl give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.