Does the Moon rotate on its axis?
a) Yes, the moon spins every 24 hours just like Earth does
b) Yes, the Moon rotates once on its axis every time it revolves about Earth so that it always has the same face facing earth
No, the Moon does not rotate because it does not orbit in the plane of the ecliptic
b) Yes, the Moon rotates once on its axis every time it revolves about Earth so that it always has the same face facing earth
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State the Second Law of Thermodynamics
What will be an ideal response?
The second law of thermodynamics
A. describes the state of a system. B. applies only when the first law is satisfied. C. precludes perpetual motion machines. D. does not apply to an isolated system.
It is very likely that the general theory of relativity will need to be refined because it is currently incompatible with
A) electromagnetism B) quantum mechanics C) Newtonian gravity D) all of these
A small 0.050-kg insulating sphere carries a charge of -60 ?C and is hanging by a vertical silk thread from a fixed point in the ceiling
An external uniform vertical electric field is now applied. If the applied electric field has a magnitude of 3000 N/C and is directed downward, what is the tension in the silk thread? (k = 1/4??0 = 9.0 × 109 N ? m2/C2 ) A) 0.19 N B) 0.31 N C) 0.41 N D) 0.52 N E) 0.71 N