These electromagnetic waves are the most energetic:
a. x rays
b. microwaves
c. radio waves
d. gamma rays

when the frequency of an electromagnetic wave increases, its energy
a. increases.
b. decreases.
c. stays the same.
d. it depends on the exact type of electromagnetic wave.

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

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?