The size of the Earth's orbit is doubled. This will allow the parallaxes of more distant stars to be measured
Indicate whether the statement is true or false
TRUE
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In Brazil, the longest period of daylight occurs during the month of
a. December. c. September. b. March. d. June.
Length Contraction: Two stars are at rest relative to each other. In their common rest frame, these stars are 90.0 light-years apart. If they are measured to be 68.7 light-years apart by the navigator of a spaceship traveling between them, how fast is the spaceship moving relative to these stars?
A. 0.646c B. 0.604c C. 0.558c D. 0.505c
Two loudspeakers are placed side by side and driven by the same source at 525 Hz. A listener is positioned in front of the two speakers and on the line separating them, thus creating a constructive interference at the listener's ear. If one of the speakers is gradually pushed toward the listener, how far must it be moved to repeat the condition of constructive interference at the listener's ear?
(The speed of sound = 340 m/s.) a. 1.5 m b. 0.65 m c. 0.32 m d. 0.16 m e. 3.1 m
If a sheet containing a single thin slit is heated (without damaging it) and therefore expands, what happens to the width of the central bright diffraction region on a distant screen?
A) It gets narrower. B) It gets wider. C) It doesn't change.