He wanna talk im bored as frik

The difference between a red shift and a blue shift has to do with wavelength frequency. t or f

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

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.