What do we mean by a runaway greenhouse effect?
A) a greenhouse effect that starts on a planet but later disappears as gases are lost to space
B) a greenhouse effect that heats a planet so much that its surface rock melts
C) a process that heats a planet like a greenhouse effect, but that involves a completely different mechanism of heating that doesn't actually involve greenhouse gases
D) a greenhouse effect that keeps getting stronger until all of a planet's greenhouse gases are in its atmosphere
D
You might also like to view...
A star whose mass is 5 times larger than the Sun's and whose luminosity is 100 times larger than the Sun's has a main sequence lifetime about
A. 5 times longer than the Sun's. B. 5 times shorter than the Sun's. C. 20 times shorter than the Sun's. D. 100 times shorter than the Sun's. E. 500 times longer than the Sun's.
Force on a Moving Charge: A proton, moving north, enters a magnetic field. Because of this field, the proton curves downward. We may conclude that the magnetic field must have a component
A. downward. B. upward. C. towards the east. D. towards the west. E. towards the north.
The magnitude of a vector an only zero if all of its components are zero
A) True B) False
Six identical blocks of steel, each with mass 10.0 kg, are taken to the Moon. On the Moon, their combined mass is
A. 60.0 kg. B. zero. C. 10.0 kg. D. 360 kg.