How many seconds are in one year? (Calculate this, do not look it up.)
A) about 380 million (380,000,000, or 3.8 × 108)
B) about 30 million (30,000,000, or 3 × 107)
C) about 86 thousand (86,000, or 8.6 × 105)
D) about 3600 (3.6 × 103)
B) about 30 million (30,000,000, or 3 × 107)
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Neglecting air resistance, Sammy Smarts on a high ladder releases a ball that strikes the ground with 100 J of kinetic energy. If he were to instead throw the ball straight upward, it will soon reach the ground with a kinetic energy of
A) less than 100 J. B) 100 J. C) more than 100 J.
Why does the term "planet" have a different meaning when applied to brown dwarfs than in our solar system?
What will be an ideal response?
Suppose that an object travels from one point in space to another. Make a comparison between the magnitude of the displacement and the distance traveled by this object
A) The displacement is either greater than or equal to the distance traveled. B) The displacement is always equal to the distance traveled. C) The displacement is either less than or equal to the distance traveled. D) The displacement can be either greater than, smaller than, or equal to the distance traveled.
When you are in a high-flying jet plane, does either your weight or your mass differ from their normal value as measured on the ground?
A) No, both your weight and your mass are exactly the same as on the ground. B) Both your weight and your mass are slightly reduced. C) Both your weight and your mass are slightly increased. D) Your weight is slightly reduced, but your mass is unchanged. E) Your weight is slightly increased, but your mass is unchanged.