Moving at 300 m/s and transmitting at 10 ghz, what subcarrier spacing ensures the induced doppler spread is 10 percent of the subcarrier spacing? answer in hz.

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

What are similarities and differences between refraction, reflection, diffraction and absorption?

Alead ball is dropped into a lake from a diving board 5m above the water . it hits the water with a certain velocity and then sink with constant velocity in bottom . it reaches the bottom 5 second after it is dropped if g= 10m/s2 . find depth of the lake and average velocity of the ball ?