The first mate of a pirate ship shoots the noonday Sun with a sextant and measures the altitude to be 50o to the south on December 21 . The time on the ship's clock is 4 P.M. (GMT). What are the longitude and latitude of the ship?
16.5°N, 60°W
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What is the thermosphere?
A) the lowest layer in the atmosphere B) the part of the atmosphere that absorbs optical light C) the part of the atmosphere that absorbs ultraviolet D) the part of the atmosphere that absorbs X-rays E) the highest layer in the atmosphere
Each element has its own set of characteristic absorption lines because
a. the temperature of each element can varies. b. elements can exist in different forms of matter. c. electron energy levels differ for each element. d. each element has a different mass. e. absorption lines depend upon the speed of the object.
Rotational Kinetic Energy: A solid uniform cylinder is rolling without slipping. What fraction of its kinetic energy is rotational?
A. 1/3 B. 2/3 C. 1/2 D. 1/4 E. 3/4
A sinusoidal wave of wavelength ? travels along a stretched string. Then the string is brought to rest and a second simultaneous wave of wavelength 2? is established on the string. The frequency of the second wave is
1.the same as that of the first wave. 2.twice that of the first wave. 3.half that of the first wave. 4.?2 times that of the first wave.