1. Which of the following demonstrates an airplane converting kinetic to potential energy? A. It ascends to a higher altitude.
B. More passengers board the plane.
C. It moves downward to make a landing.
D. The wheels spin as it moves on the ground.

What was the first instrument to ever record an earthquake?

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=

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?