Suppose scientists discover (somehow) that if ?T, the average global temperature increase since 1900, were to exceed 1.0°C, Greenland’s ice sheet would irreversibly start to collapse within 20 years, raising ocean levels significantly. ?T is currently 0.8°C. What might we do to prevent this from happening?
A. Cut CO2 emissions in half.
B. Completely stop emitting CO2 now.
C. Actively start removing CO2 from the atmosphere.
D. We probably can’t prevent this from happening, no matter what we do.
D. We probably can’t prevent this from happening, no matter what we do.
You might also like to view...
According to Lenz’s Law the direction of the induced current produced by a changing magnetic flux is such as to produce a magnetic field that
A. reinforces the change in the original magnetic flux. B. opposes the change in the original magnetic flux.
What kind of planet is most easily detected using the transit method?
A) large planets in edge-on orbits around small stars B) large planets in face-on orbits around small stars C) small planets in edge-on orbits around big stars D) small planets in face-on orbits around big stars E) Earth-like planets in any orbit
A bar magnet is attached solidly to a frictionless surface and its length is aligned with the x axis. To the right of the first magnet a short distance away is a second bar magnet with its center placed on the x axis and its length perpendicular to the x axis. The second magnet is free to move. Once placed in position at rest, which best describes the initial motion of the second magnet?
a. The magnet will move away from the fixed magnet. b. The magnet will not move. c. The magnet will move toward the fixed magnet. d. The magnet will start to rotate.
How does Mercury's magnetic field compare to our own?
A) Like Venus, Mercury has no detectable magnetic field. B) Like Mars and the Earth, it too has undergone polarity reversals. C) It is 1/100th as strong as ours, but does deflect the solar wind to some degree. D) It is amazingly strong, comparable to our own. E) It was predicted from Mercury's rapid rotation and molten core.