The law of conservation of momentum is applicable to systems made up of objects described by which of the following?
a. macroscopic
b. microscopic
c. interacting through friction
d. All the above choices are valid.
d
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An experiment to measure the speed of light uses an apparatus similar to Fizeau's. The distance between the light source and the mirror is 10 m, and the wheel has 800 notches. If the wheel rotates at 9000 rev/s when the light from the source is extinguished, what is the experimental value for c (in m/s)?
a. 2.94 × 10^8 b. 2.92 × 10^8 c. 2.88 × 10^8 d. 2.98 × 10^8 e. 3.01 × 10^8
If you could find a bathtub big enough for Saturn, the planet would
A) explode due to its liquid metallic hydrogen. B) sink due to its metallic interior. C) catch fire, as liquid sodium reacts with water. D) float. E) precipitate more helium.
The principal greenhouse gases are ______________ and ______________
Fill in the blank(s) with correct word
A conductor differs from an insulator in that a conductor has more
A) electrons than protons. B) protons than electrons. C) energy than an insulator. D) faster moving molecules. E) none of the above