In the context of planetary geology, what do we mean by outgassing?
A) the release by volcanism of gases that had been trapped in a planetary interior
B) the loss of atmospheric gas to outer space
C) another name for a volcanic eruption
D) the evaporation of water that adds water vapor (a gas) to an atmosphere
A
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A physics class in a large lecture hall has 15 students. The total mass of the students is about _____ kg. (You will need to make a reasonable estimate of a missing physical quantity.)
a. 102 c. 104 b. 103 d. 105
At what rate would the current in a 100-mH inductor have to change to induce an emf of 1000 V?
A) 100 A/s B) 1 A/s C) 1000 A/s D) 10,000 A/s E) 10 A/s
An x vs. t graph is drawn for a ball moving in one direction. The graph starts at the origin and at t = 5 s the velocity of the ball is zero. We can be positive that at t = 5 s,
a. the slope of the curve is non-zero. b. the ball has stopped. c. the acceleration is constant. d. the curve is at x = 0, t = 0.
Every time the Earth and Venus are closest, the same side of Venus is facing us
Indicate whether the statement is true or false