The source of the sun's heat is

A. nuclear disintegration.

B. nuclear separation.

C. nuclear fission.

D. nuclear fusion.

What type of energy is a hot cup of soup and is it mechanical or not?

Which statement is true about alkali metals? A. Some of them explode when exposed to water. B. They are in group 18 of the periodic table. C. They are not conductors of heat or electricity. D. They are not very reactive.

What is the potential energy of your 3kg puppy sitting in the grass in your backyard?

For which of these would the special theory of relativity be most important? A. the space shuttle orbiting Earth B. a collision between two large trucks on a highway C. the eruption of a large volcano after many earthquakes D.

Correctly round the following number to the ten thousandths place 3.68274

A car traveling 26 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is it's acceleration. ___m/s^2

Less work was done. What is one possible reason why this has happened? A. There was more force applied; therefore, there was less movement. B. There was less force applied; therefore, there was more movement. C.

What are the optimal conditions for using a solar oven?

What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.5 mm and an eyepiece whose focal length is 2.9 cmcm? Follow the sign conventions.

Who was the first person to observe a sign of molecular motion?