Which of the following statements about the moons of the jovian planets is not true?
A) Some of the moons are big enough that we'd call them planets (or dwarf planets) if they orbited the Sun.
B) One of the moons has a thick atmosphere.
C) Many of the moons are made largely of ices.
D) Most of the moons are large enough to be spherical in shape, but a few have the more potato-like shapes of asteroids.
D
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Which of the following statements is TRUE?
a) Jupiter's solid surface lies just below the cloud layers visible from Earth. b) The Great Red Spot is a dust storm near the South polar cap of Mars. c) There is no evidence to suggest that either Jupiter or Saturn has a rocky core. d) Neither Uranus or Neptune have ring systems. e) The planet Uranus is blue-green and virtually featureless.
An iron atom’s nucleus has 26 protons and 30 neutrons. A helium atom’s nucleus has 2 protons and 2 neutrons. Solid iron is much denser than helium gas. How does the total positive charge in a gram of iron compare to that of a gram of helium?
A. Iron has more positive charge than helium per gram. B. Iron has the same positive charge as helium per gram. C. Iron has less positive charge than helium per gram. D. There is not enough information to tell.
Identify the FALSE statement. Differentiation of large planetesimals and protoplanets:
is the process by which these bodies develop internal layering. began with heating up component materials within these bodies. was caused by heat created by the transformation of kinetic energy from collisions into thermal energy. was inhibited if radioactive elements were present because their decay required heat input from the surroundings. resulted in a central ball of iron alloy (the core) and an outer shell of lighter rocky materials (the mantle.)
In a double-slit interference experiment you are asked to use laser light of different wavelengths and determine the separation between adjacent maxima. You observe that this separation is greatest when you illuminate the double slit with
A) blue light. B) green light. C) yellow light. D) red light. E) The separation is the same for all wavelengths.