Aperson drives to the top of a mountain. on the way up, the person’s ears fail to “pop,” or equalize the pressure of the inner ear with the outside atmosphere. the pressure of the atmosphere drops from 1.010 x 10^5 pa at the bottom of the mountain to 0.998 x 10^5 pa at the top. each eardrum has a radius of 0.40 cm. what is the pressure difference between the inner and outer ear at the top of the mountain? a. 1.2 x 10^3 pa b. 1.1 x 10^5 pa c. 1.0 x 10^2 pa d. 1.2 x 10^2 pa

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=