Simple Harmonic Motion: If a floating log is seen to bob up and down 15 times in 1.0 min as waves pass by you, what are the frequency and period of the wave?
Fill in the blank(s) with the appropriate word(s).
0.25 Hz, 4.0 s
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Which hypothesis was out-ruled by the solar nebular theory?
a. planet accretion hypothesis b. imploding cloud hypothesis c. passing star hypothesis d. condensation hypothesis e. catastrophic hypothesis
Jupiter has only four moons
a. True b. False Indicate whether the statement is true or false
Tan's face is 20 cm in front of a concave shaving mirror. If he observes his image to be twice as big and upright, what is the focal length of the mirror?
A) 10 cm B) -40 cm C) -50 cm D) 40 cm E) 50 cm
If the orbit is elliptical, rather than circular, what can be said about the work done by the Sun on Earth?
a. It does not matter whether the orbit is circular or elliptical, no work is done. b. If the orbit is elliptical, work is done to speed up or to slow down Earth, depending on its location in orbit. c. Whether the orbit is circular or elliptical, work must be done to propel Earth around the Sun. d. The work the Sun does on Earth accounts for Earth's changes of season. e. The work the Sun does on Earth causes the tides.