Which part of the EM spectrum is used in night vision goggles?

The energy produced as a result of this flow of electrons from atom to atom is called

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping.the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?

The electric field inside a cell membrane is 8.0mn/c. what's the force on a singly charged ion in this field?