Two identical conducting spheres are placed with their centers 0.25 m apart. One is given a charge of +1.1 × 10−8 C and the other a charge of −2 × 10−8 C. Find the magnitude of the electric force exerted by one sphere on the other. The value of the Coulomb constant is

What do radio waves and microwaves have in common? both are at the side of the spectrum that has the shortest wavelengths. both are at the side of the spectrum that has the lowest radiant energy. both are at the side of the spectrum that has the lowest frequency. both are found next to visible light on the electromagnetic spectrum.

The metric unit of electrical power is the watt volt ampere ohm

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d