The principle of the photoelectric effect is:

A) the electromagnetic theory of light

B) the special theory of relativity

C) the principle of superposition

D) the quantum theory of radiation

Which sentence does not contain any errors in capitalization? a. The professor was an expert in the Politics of the nixon era. b. Have you seen the egyptian art exhibit yet? c. We have climbed mountains in three South American countries. d.

A carousel has a radius of 1.70 m and a moment of inertia of 126 kg · m2. A girl of mass 48.5 kg is standing at the edge of the carousel, which is rotating with an angular speed of 3.00 rad/s.

A car has a mass of 8000 kg and a kinetic energy of 24,000 J. What is its speed?

If a simple machine reduces the strength of a force, what must be increased? A. the distance that the force moves B. the work the simple machine performs C. the speed of the input force D. the size of the simple machine

An atom has 35 protons. what element is it?

During World War II, both the Allied and Axis powers used propaganda to A. weaken public support for the war. B. downplay public opinion. C. manipulate the public through the use of humor. D. shape public support of the war

What type of simple machine is a hand drill? A) pulley B) wedge C) ramp D) screw

Calculate the wavelength and frequency of the radiation emitted by the electronic transition from the 10th to the 9th excited state of hydrogen.

An unknown fluid has a specific gravity of 0.750. What is the volume of 22.5 kg of this fluid? A. 10 L B. 20 L C. 30 L D. 40 L

What kind of tide is responsible for extreme tides