What is the distance from the center of the Moon to the point between Earth and the Moon where the gravitational pulls of Earth and Moon are equal?
The mass of Earth is 5.97 × 1024 kg, the mass of the Moon is 7.35 × 1022 kg, the center-to-center distance between Earth and the Moon is 3.84 × 108 m, and G = 6.67 × 10-11 N ? m2/kg2.
A) 3.45 × 108 m B) 3.84 × 107 m C) 4.69 × 106 m D) 4.69 × 107 m E) 3.83 × 106 m
B
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The most striking and largest valley in the solar system is
A) the Grand Canyon in Arizona. B) Gwenivere on Venus. C) the Discovery Scarp of Mercury. D) Valles Marineris on Mars. E) Valhalla on Callisto.
What causes the bubbling pattern of granulation that we see in the Sun's photosphere?
A) underlying convection B) sunspots C) dark areas of the pattern have larger concentrations of carbon D) dust particles E) magnetic fields
A charged particle (q = -8.0 mC), which moves in a region where the only force acting on the particle is an electric force, is released from rest at point A. At point B the kinetic energy of the particle is equal to 4.8 J. What is the electric potential difference VB - VA?
a. -0.60 kV b. +0.60 kV c. +0.80 kV d. -0.80 kV e. +0.48 kV
When a cool gas is placed between a glowing wire filament source and a diffraction grating, the resultant spectrum from the grating is which one of the following?
a. line emission c. line absorption b. continuous d. monochromatic