Why is a holographic image of a microscopic object better than a two - dimensional image of the object?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

What is the measure of a change in an objects velocity?

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.