Receiver
questions:
1) going back to the idea of a plane before take off. why was the sound of the engine louder when it goes from low to high power
goes from low to high power?
use the terms volume, energy, and amplitude to explain your answer
2) graph what the sound wave would look like for a 2 year old girl laughing and a 40 year old man
laughing

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=