The boy moving down the hill posses what energy?

Which are characteristics of a ray when it hits a boundary and refracts, but not when it hits the boundary and reflects? Check all that apply. A. changes direction B. changes speed C. does not change direction D. does not change speed E.

Astronomy can best be described as a/an A. study of objects beyond the Earth's atmosphere. B. daily horoscope. C. Air Force pilot on a naval carrier. D. study of objects pertaining to the interior part of the Earth.

Two positive charges of 2.8 x 10^-6 are separated by 0.50m. What force exists between the two charges?

Comic-strip Superhero meets an asteroid in outer space and hurls it at 800 m/s, as fast as a speeding bullet. The asteroid is a thousand times more massive than Superhero. In the strip, Superhero is seen at rest after the throw.

Which of the following is equivalent to 10 kilograms? a) 1000 grams b) 100 hectogram c) 1 hectogram d) 1000 centigrams

If a mineral can be mined, what is it called? A. A metal B. A precious jewel C. An ore D. A gemstone

When did the Space Age begin?

If the truck has a mass of 2,000 kilograms, what is its momentum? Express your answer in kg·m/sec.

What is the mass of an object with a density if 4.0g/cm3 that displaces 3.0cm3 of water?

aluminum has 13 electrons. how many electrons are found in the outermost energy level for this atom which energy level is the outermost