Johnny drives from Missouri to California (1920 miles) in 32.0 hours. He returns home by the same route in the same amount of time.
Determine his average speed.
b. Determine his average velocity.
c. Compare these two values and explain any differences.

Why do electron microscopes have higher resolving power than light microscopes?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

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=