What is "ice geology"? Give an example illustrating why it is important in the outer solar system
What will be an ideal response?
Ice geology is the formation of surface features due to ice melting and flowing, similar to lava flows on Earth. Many of the jovian moons are made of water, ammonia, and methane ices, and since these melt at far lower temperatures than rock, even small amounts of heating (from tidal effects for example) can sustain a surprising amount of geologic activity. An example is Enceladus, a small moon of Saturn, in which ice flows have filled in many craters.
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A space station in the form of a large wheel, 120 m in diameter, rotates to provide an "artificial gravity" of 3.00 m/s2 for persons located at the outer rim. Find the rotational frequency of the wheel (in revolutions per minute) that will produce this effect
From the edge of a roof top you toss a green ball upwards with initial velocity v0 and a blue ball downwards with the same initial velocity. When they reach the ground below,
A) the green ball will be moving faster than the blue ball. B) the blue ball will be moving faster than the green ball. C) the two balls will have the same speed.
If a galaxy is moving away from us at 1.0% of the speed of light, how far away is it from us?
A) 14 ly B) 140 ly C) 140 thousand ly D) 140 million ly E) 140 billion ly
The energy used by a 100 watt light bulb in 1 hour is
a. 0.01 J b. 360,000 J c. 100 J d. 6,000 J e. none of the above