What happens to light waves from a star as the star moves toward earth?

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.

At what time will the interfering waves have an amplitudeof zero?

Properties seen when one one substance changes to another are known as properties