As long as an object is not gaining or losing mass, a net force on the object will cause a change in
A) acceleration.
B) direction.
C) weight.
D) speed.
E) velocity.
E
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A ray of light passes from one material into a material with a higher index of refraction. Which quantity remains unchanged?
a. The light's speed b. The light's wavelength c. The light ray's angle with the normal d. The photon energy
Two metal spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount,
A) the solid sphere becomes denser and the hollow one less dense. B) the two spheres remain of equal size. C) the solid sphere becomes less dense and the hollow one denser. D) the solid sphere becomes bigger than the hollow one. E) the hollow sphere becomes bigger than the solid one.
What creates a total lunar eclipse? a. The Sun passes completely through Earth's umbra. b. The Moon passes completely through Earth's umbra
c. The Moon passes through some of Earth's penumbra. d. The Earth passes completely through the Moon's umbra. e. The Earth passes through some of the Moon's penumbra.
A supertanker filled with oil has a total mass of 6.1 × 10^8 kg. If the dimensions of the ship are those of a rectangular box 300 meters long, 80 meters wide, and 40 meters high, determine how far the bottom of the ship is below sea level. (rsea = 1 020 kg/m3.)
a. 10 m b. 15 m c. 20 m d. 25 m e. 30 m