If the mass of a proton is 1.67 × 10^-27 kg, what is the rest energy of the proton? (c = 3.00 × 10^8 m/s and 1 eV = 1.6 × 10^-19 J)
a. 9.4 × 10^8 eV
c. 3.7 × 10^8 eV
b. 4.1 × 10^8 eV
d. 1.2 × 10^8 eV
A
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The first-quarter Moon rises
a. at about noon. b. at sunset. c. at sunrise. d. at about midnight. e. during the second week of each calendar month.
This graph shows a gravitational wave signal recorded by the gravitational wave detectors (called LIGO) in two locations. What do models indicate was the cause of this signal?
A) the merger of two black holes in a distant galaxy B) a supernova in a distant galaxy C) the sudden explosion of an entire galaxy D) an x-ray burst on the surface of a neutron star
If distance is speed × time and light takes 8 minutes to travel from the Sun to Earth and over 4 hours to travel from the Sun to the planet Neptune, what is the distance from the Sun to Neptune?
a. 5 AU b. 30 AU c. 30 ly d. 5 ly e. 0.6 ly
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