Relative to the stars, the Moon moves from ________ to ________.
A. east; west
B. west; east
Answer: B
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Our Sun is considered to be a(n) ________
A) brown dwarf B) low-mass star C) high-mass star D) intermediate-mass star
Two wires, one copper and the other steel, of equal length stretch the same amount under an applied load P. The moduli of elasticity for each is Es 5 210 GPa and Ec 5 120 GPa. The ratio of the diameter of the copper wire to that of the steel wire is approximately:
(A) 1.00
(B) 1.08
(C) 1.19
(D) 1.32
A river 100 m wide flows due south. A boat that goes 1 m/s relative to the water is pointed due east as it crosses from the west bank. The boat crosses in
A) 50 s. B) 100 s. C) 141 s. D) 200 s.
A 40-mC charge is positioned on the x axis at x = 4.0 cm. Where should a -60-mC charge be placed to produce a net electric field of zero at the origin?
a. -5.3 cm b. 5.7 cm c. 4.9 cm d. -6.0 cm e. +6.0 cm