A cannon ball is launched horizontally with a velocity of 36 m/s from a cliff and lands on the ground in 4.6 s. How far from the base of the cliff does the cannon ball land?
109.2 m
78.2 m
136.4
165.6 m

The magnitude of the poynting vector of a planar electromagnetic wave has an average value of 0.939 w/m^2 . the wave is incident upon a rectangular area, 1.5 m by 2.0 m, at right angles. how much total electromagnetic energy falls on the area during 1.0 minute?

Select all the correct answers. which three statements about electromagnetic radiation are true?

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?