The Sun is the main source responsible for heating the surface of the Earth. Is this true or false? Give reasons to support your position.

What is a homopolar motor?)

Light incident on a lake surface is partly reflected and partly refracted. What is the differences between the reflected ray and incident ray?

Which factor affects the speed of a wave

What is electrical resistivity? What is its unit? Describe an experiment to study the factors on which the resistance of conducting wire depends.

A car starts from rest and after 7 seconds it is moving at 42 m/s. What is the car's average acceleration? A. 0.17 m/s2 B. 1.67 m/s2 C. 6 m/s2 D. 7 m/s2 E. none of the above

Hot air balloon rises because a) molecules become lighter when heated b) molecules move faster and farther apart when heated c) molecules are less attracted by gravity when heated d) molecules become charged and repel each other when heated

If the diameter of the space station is 730 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80m/s2?

A person who has dissociative identity disorder: O A. cannot remember who he or she is. O B. has panic attacks when confronted. C. has two or more distinct personalities OD hears voices

Which force most likely created this mountain? compression gravity sheaning tension

What is the opposition of sublimation?