What are the two main sources of energy on earth?

How do organisms use geosphere?

If a bar magnet is broken into few pieces, what will the poles each individual broken piece be? How you can find out whether your answer is correct

Whom or what did President Roosevelt describe as "the rattlesnakes of the Atlantic"? U. S. Navy ships and their crews German U-boats and their crews Axis nations and their leaders Japanese warplanes and their pilots

Match the particles with their characteristics, subatomic particles with a positive charge subatomic particles with a negative charge subatomic particles with no charge made of atoms neutrons - > electrons protons molecules

A mass on a spring that has been compressed 0.1 m has a restoring force of 20 N. What is the spring constant?

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why:

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?