In Einstein's General Theory of Relativity, gravity is explained as
A) action at a distance
B) the curvature of spacetime
C) a basic component of the atom
D) a force-carrying particle called the graviton
B
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The first planets ever discovered outside our Solar System were
A: Making their host stars wobble around detectably in the sky B: Transiting their host stars once every day C: Brightening background stars via microlensing D: In orbit around a millisecond pulsar, not a normal star E: Making their host stars wobble around such that the velocity could be detected by the Doppler Effect
A child pulls on a wagon with a force of 75N. If the wagon moves a total of in what is the average power delivered by the child?
A) 17 W B) 21 W C) 22 W D) 26 W
Jupiter's ring is composed of particles of frozen ice
a. True b. False Indicate whether the statement is true or false
Escape Speed: How do the escape speeds for two rockets, the first weighing 20 N and the second weighing 20,000 N compare?
A. The escape speed for the lighter rocket is smaller than that for the heavier rocket. B. The escape speed for the lighter rocket is the same as that for the heavier rocket. C. The escape speed for the lighter rocket is greater than that for the heavier rocket.