the second thumbnail is the figure of the question..
Welcome to PF. Before we can help you, please post your thoughts on the question. Better still, use the homework template with which you were provided
In order to answer questions like this, first think:
Do the assumptions given allow me to regard some property/phenomenon as remaining the same, or that is, CONSERVED, throughout the entire period of observation?
i have to bring it up tomorrow afternoon..
Does that excuse you from doing independent thinking of your own??
Have you at all bothered to reflect upon the question I posed you?
Separate names with a comma.