Which of the following is Jupiter's largest moon?
a. Io
b. Europa
c. Ganymede
d. Callisto
c
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Which of these was NOT a telescopic discovery of Galileo?
A) the moons of Saturn B) the craters and mare of the Moon C) sunspots and the rotation of the Sun D) the four largest moons of Jupiter E) the phases of Venus
Briefly explain the paradox of the question "Where are the aliens?"
What will be an ideal response?
A car is driven 1 200 m north at 20.0 m/s and then driven 1 600 m east at 25.0 m/s. What is the magnitude of the average velocity for this trip?
a. 16.1 m/s b. 22.6 m/s c. 31.3 m/s d. 11.3 m/s e. 62.2 m/s
A cube of water ice (r = 0.917 × 10^3 kg/m3) is placed in mercury (r = 13.6 × 10^3 kg/m3), which is liquid at 0° Celsius. If we ignore any possible melting of the ice cube and problems with the surface tension of mercury, the fraction of the ice cube that floats above the surface of the mercury is
a. 0.067 4. b. 0.073 5. c. 0.926. d. 0.933. e. 1.00.