The winner in a tug-of-war exerts the greatest force on
A) the opponent.
B) his or her end of the rope.
C) the ground.
Answer: C
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Which of the following locations would receive the most incoming solar radiation at noon during the spring equinox?
What will be an ideal response?
True or False: A photon is reflected from a mirror. Although the photon carries momentum, its change in momentum is zero when it reflects from the mirror, so it can't exert a force on the mirror
1.True 2.False
The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
A. its speed is constant. B. its speed is increasing. C. its speed is decreasing. D. its speed is a maximum. E. its speed is a minimum.
Most of the extrasolar planets found so far were detected by
A) receiving radio transmissions from them, much like Jupiter emits. B) noting the drop in the star's light as the planet transits its disk. C) imaging them with the HST in the infrared, where they are easier to stop. D) detecting the oxygen in their atmospheres spectroscopically. E) noting the Doppler shifts of the star as the planet orbits it from side to side.