The first confirmed detections of extrasolar planets occurred in
A) the 1990s.
B) the mid-17th century.
C) the 1920s.
D) 2009.
A) the 1990s.
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The reason we don't see stars in the daytime is because
A) the sky is too bright. B) stars shine only at night. C) there are no stars in the direction of the Sun. D) stars disappear in the daytime.
A simply supported beam is loaded as shown in the figure. The bending moment at point C is approximately:
(A) 5.7 kN?m
(B) 6.1 kN?m
(C) 6.8 kN?m
(D) 9.7 kN?m
The magnitude of the resultant of two vectors cannot be less than the magnitude of either of those two vectors
A) True B) False
The speed of light changes when it goes from ethyl alcohol (n = 1.36) to carbon tetrachloride (n = 1.46). The ratio of the speed in carbon tetrachloride to the speed in ethyl alcohol, v2/v1, is
a. 1.99 b. 1.07 c. 0.932 d. 0.511 e. 0.760