Which statement describes an example of constructive interference? O A. Light forms bars on a surface after passing through two slits.
B. Two TV signals reach an antenna and cancel each other out.
C. Oil spilled in a water puddle shows different colors of light.
D. A cell-phone signal is lost when you pass through a certain area.

More solar radiation is absorbed by earth’s surface than by

Which statement best describes the superposition principle? a.) if two in-phase waves arrive simultaneously at a point, their amplitudes add up b.) if two out-of-phase waves arrive simultaneously at a point, their amplitudes add up c.) if two in-phase waves arrive at a point one after another, their amplitudes add up d.) if two out-of-phase waves arrive at a point one after another, their amplitudes adds up

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.