Abeam of monochromatic light (frequency w) in vacuum is incident normally on a dielectric film of refractive index n= (e/e0)1/2. the thickness of the film is d. calculate the reflection coefficient for the reflected wave as a function of d and n. [ hint: assume two waves traveling in opposite directions inside the film.]

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

Apotter's wheel moves uniformly from rest to an angular speed of 0.20 rev/s in 32.0 s. (a) find its angular acceleration in radians per second per second. rad/s2 (b) would doubling the angular acceleration during the given period have doubled final angular speed?

Which of these activities increases the amount of carbon in the atmosphere?