An electromagnetic wave has frequency of 2x10^15 Hz and a wavelength of 1.5x10^-7 m. At what velocity is it travelling? Use the equation V= λ * F someone please help me and fast with all the work shown. I'll give brainliest and hella points. fast
​

Explain the doppler effect in terms of frequency, wavelength, and speed.

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.

Energy flows from the producer level to the level. is called