1. according to the nebular theory, the solar system formed from ?
a. accretion of prot...
1. according to the nebular theory, the solar system formed from ?
a. accretion of protoplanets.
b. a large, thin cloud of dust and gas.
c. colliding planetesimals.
d. all of the above
2. which of the following statements explains why the terrestrial planets are small and rocky instead of large and less dense like the gas giants?
a. the inner planets were exposed to much higher temperatures.
b. ice-forming compounds vaporize at high temperatures.
c. rock-forming materials can condense at high temperatures.
d. all of the above
Answers: 1
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An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?
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