Tides are influenced by
a. the Moon.
b. the Sun.
c. the uneven surface of the Earth.
d. all of the above.
e. none of the above.
d
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Lenz's Law: As shown in the figure, a C-shaped conductor is in a uniform magnetic field B out of the page, and this field is increasing. What is the polarity of the induced emf in terminals X and Y?
A. X and Y are at the same potential. B. X is positive and Y is negative. C. Y is positive and X is negative.
If vector = -3.0 - 4.0 , and vector = +3.0 -8.0 , then the magnitude of vector = - is
A) 3.0 B) 16 C) 7.2 D) 144 E) 13.4
According to Einstein's theory of relativity, the universe is made of
A) matter and anti-matter. B) radiation. C) energy. D) popcorn. E) matter.
A point on the rim of a 0.25-m radius fan blade has centripetal acceleration of 0.20 m/s2 . Find the centripetal acceleration of a point 0.1 m from the center of the same wheel
a. 0.01 m/s2 c. 0.04 m/s2 b. 0.02 m/s2 d. 0.08 m/s2