The study of fossils is called ______________
Fill in the blank(s) with correct word
paleontology
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Standing Sound Waves: One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. What is the fundamental frequency of the air column in this tube?
A. 32 Hz B. 64 Hz C. 88 Hz D. 128 Hz E. 256 Hz
The pressure exerted by a gas is the result of
a. the Bernoulli effect. b. molecular collisions. c. Pascal's principle. d. the ideal gas law. e. none of the above.
The sky appears to be blue during the day because:
1.Air absorbs blue light less than other frequencies (i.e., acts like a blue filter). 2.Air molecules emit blue light after being struck by sunlight. 3.The sky reflects blue light from the oceans. 4.The temperature high in the Earth's upper atmosphere is 1000 K. 5.None of the above.
Two bodies with masses m1 and m2 are both moving east with velocities of magnitudes v1 and v2, where v1 is less than v2 . The magnitude of the velocity of the center of mass of this system of two bodies is
a. less than v1. b. equal to v1. c. equal to the average of v1 and v2. d. greater than v1 and less than v2. e. greater than v2.