The star's ________ plays the major role in determining its main sequence position and luminosity
Fill in the blank(s) with correct word
mass
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How many nodes and antinodes are shown in the standing wave above?
a. two nodes and three antinodes b. one node and two antinodes c. one-third node and one antinode d. three nodes and two antinodes
Doppler Effect: You are moving at 120 km/h toward a stationary train. The train blows its 0.400-kHz whistle. Take the speed of sound to be 340 m/s. What frequency do you hear?
A. 444 Hz B. 439 Hz C. 364 Hz D. 361 Hz
_______________ clusters of galaxies contain closely spaced galaxies and often contain giant elliptical galaxies and a hot intergalactic medium
Fill in the blank(s) with correct word
Most meteors seen as shooting stars are about the size of
A) grains of sand. B) baseballs. C) small buildings. D) very large buildings. E) small continents.