Which moons of our solar system are sometimes called the Galilean moons?
A) the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto
B) the two largest moons in the solar system: Ganymede and Titan
C) the moons that orbit their planet "backward" compared to their planet's rotation, such as Neptune's moon Triton
D) the moons orbiting Uranus, which was once named "planet Galileo"
A) the four largest moons of Jupiter: Io, Europa, Ganymede, and Callisto
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Approximately how long does energy take to travel from the core to the surface of the Sun?
A. 10 billion years B. 16 million years C. a few seconds D. a few minutes E. a thousand years
The observed acceleration of the expansion of the Universe is evidence that some form of energy, either a cosmological constant or quintessence, is spread throughout space
Indicate whether the statement is true or false
A certain amount of ideal monatomic gas is maintained at constant volume as it is cooled from 455K to 405 K. This feat is accomplished by removing 400 J of heat from the gas. How much work is done by the gas during this process?
The ideal gas constant is R = 8.314 J/mol ? K. A) 0.00 J B) 200 J C) 400 J D) -400 J E) -200 J
You cannot exert a force on a wall
A) if the wall resists. B) unless you put your mind to it. C) unless the wall simultaneously exerts the same amount of force on you.