Earth doesn't experience a solar eclipse every month because
a. of unpredictable weather patterns.
b. the Moon always keeps its same side toward the Earth.
c. the Moon's orbit plane is not aligned with the Earth's orbit plane.
d. its sometimes nighttime when the eclipse occurs.
e. sometimes the Moon is too far away.
c
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Which object is hotter?
A. Object 2 at T = 0° F B. Object 1 at T = 0° C C. Object 3 at T = 0 K
A open star cluster will have a(n) _____________ turn-off point than an older star cluster
Fill in the blank(s) with correct word
An astronomical unit (AU) is ________
A) the average distance between Earth and the Sun B) the average distance between any planet and the Sun C) any very large unit, such as a light-year D) the current distance between Earth and the Sun
A conducting rod (length = 2.0 m) spins at a constant rate of 2.0 revolutions per second about an axis that is perpendicular to the rod and through its center. A uniform magnetic field (magnitude = 8.0 mT) is directed perpendicularly to the plane of rotation. What is the magnitude of the potential difference between the center of the rod and either of its ends?
a. 16 mV b. 50 mV c. 8.0 mV d. 0.10 mV e. 100 mV