Which statement about Io is true?
A) It is the only moon in the solar system with a thick atmosphere.
B) It is thought to have a deep, subsurface ocean of liquid water.
C) It is the most volcanically active body in our solar system.
D) It is the largest moon in the solar system.
C
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The event horizon of a black hole is the point where _____
a. the mass of the black hole is concentrated in a singularity b. the accretion disk around the black hole contacts its surface c. the escape velocity equals the speed of light d. tidal forces ionize infalling gas e. an infalling particle reaches equilibrium with radiation pressure
The energy difference between adjacent orbit radii in a hydrogen atom
A) decreases with increasing values of n. B) increases with increasing values of n. C) remains constant for all values of n. D) varies randomly with increasing values of n.
A spaceship traveling at constant speed away from the Sun crosses the orbit of Earth and later crosses the orbit of Mars
What is the distance between these two events in the spaceship frame of reference? The radius of Earth's orbit is 150 × 109 m and that of Mars is 228 × 109 m.
What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) if the film is 78.0 nm thick?
a. 467 nm b. 386 nm c. 456 nm d. 404 nm e. 499 nm