we're interested in knowing the rate at which light energy is received by a unit of area on a particular surface, we're really trying to figure out the A. luminous flux. B. illuminance of a surface. C. incandescence. D. luminous intensity.

Which two conditions must exist in order for radiation to occur

A small ball weighs 1.4 N. gravitational field strength, g = 9.8 N / kg Calculate the mass of the ball.

Chemical bonds form when atoms A.) gain protons. B.) combine nuclei C.) give up neutrons. D.) share or transfer electrons

When a ball is dropped it bounces until it eventually stops why does this happen A) some of the balls energy is lost B) some of the balls energy is converted to other forms such as thermal and sound C) all of the balls energy is eventually converted

Which one of the following substances is a liquid fuel used in rocket engines? A. Codium nitrate B. Ammonia C. Potassium perchlorate D. Liquid oxygen

How are magnetic stripes near mid-ocean ridges evidence for sea-floor spreading?

If a truck has a mass of 2 x 106 grams and a velocity of 35m/s, what is its momentum? kgm/s a. 2 million b. 70 c. 57.14 d. 70,000 e. 57,100

A scientist heats a piece of iron until it is glowing white-hot. he places the metal inside a metal box. he removes all of the air from the inside of the box.

Johanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. 1. gravitational potential energy 2. electrical energy 3. kinetic energy 4. mechanical energy 5. elastic potential energy

The density of sugar is 1.59 g/cm3. the mass of a sample is 4.0 g. find the volume of the sample