Two tiny spheres with charges +20×10^-8 C and -5.0×10^-8 C with 10cm apart. Point P in the middle of it. a) Calculate the electric field E at point P.
b) Find where in the region the electric field would be zero.
c) Calculate the force on a -4.0 x 10^-8 C charge placed at P.​

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 11.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.80 m/s; (b) he is then lifted at the constant speed of 4.80 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 78.0 kg rescue by the force lifting him during each stage

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.

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?