Energy can be neither be be created or destroyed, it can only be from one form to another. what is the blank? pl pl asap!

What is the role of lenses in microscopy?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=

Distinguish between linear momentum and angular momentum