A spaceship enters the solar system moving toward the Sun at a constant speed relative to the Sun
By its own clock, the time elapsed between the time it crosses the orbit of Jupiter and the time it crosses the orbit of Mars is 50.0 minutes. How fast is the spaceship traveling towards the Sun? The radius of the orbit of Jupiter is 778 × 109 m, and that of the orbit of Mars is 228 × 109 m.
A) 0.319c
B) 0.438c
C) 0.522c
D) 0.671c
E) 0.982c
C
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A. VW B. WX C. XY D. YZ
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A 2.0-kg block slides down a plane (inclined at 40° with the horizontal) at a constant speed of 5.0 m/s. At what rate is the gravitational force on the block doing work?
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