In a thundercloud there may be an electric charge of 28 C near the top of the cloud and −28 C near the bottom of the cloud. If these charges are separated by about 8 km, what is the magnitude of the elec- tric force between these two sets of charges? The value of the electric force constant is 8.98755 × 109 N · m2/C2.
Answer in units of N.

An artificial satellite circles the earth in a circular orbit at a location where the acceleration due to gravity is 6.03 m/s^2. determine the orbital period of the satellite.

When you turn on a battery-operated device, an electrical circuit is

20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.