In what range of masses are most stars found?
A) 0.01 to 100 solar masses
B) 1 to 3 solar masses
C) 0.1 to 100 solar masses
D) 0.1 to 2 solar masses
E) Stars can have any mass.
C
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Photon Energy: Gamma rays are photons with very high energy. How many visible-light photons with a wavelength of 500 nm would you need to equal the energy of a gamma-ray photon with energy 4.1 × 10-13 J?
A. 1.0 × 106 B. 1.4 × 108 C. 6.2 × 109 D. 3.9 × 103
Why is the full Moon the brightest light in the night sky?
A useful method of expressing very small or very large numbers is
A) scientific notation. B) arabic numerals. C) roman numerals. D) significant figures. E) greek letters.
Two instruments produce a beat frequency of 5 Hz. If one has a frequency of 264 Hz, what could be the frequency of the other instrument?
a. 269 Hz b. 254 Hz c. 264 Hz d. 5 Hz e. 274 Hz