Gamma ray technology can be used to do which of the following? a. treat tumors in the body. b. communicate across long distances. c. speed up the process of hardening paint. d. monitor human activity at night.

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.