Which will cool faster when removed from a furnace?
A) iron
B) silver
C) the same
Answer: B
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Notice that the peaks and troughs on the temperature graph occur at the about the same times as peaks and troughs on the carbon dioxide graph. What can we infer from this fact alone?
A. Higher global average temperatures cause higher carbon dioxide concentrations. B. Higher carbon dioxide concentrations cause higher global average temperatures. C. The carbon dioxide concentration is inversely related to the global average temperature. D. There is a correlation between the carbon dioxide concentration and the global average temperature.
Visiting comets and asteroids: In recent years, several space probes have been sent to comets and asteroids to physically interact with them
Briefly describe three of these missions, and compare how each allows astronomers to better study the composition of these objects.
A wheel rotating about a fixed axis with a constant angular acceleration of 2.0 rad/s2 turns through 2.4 revolutions during a 2.0-s time interval. What is the angular velocity at the end of this time interval?
a. 9.5 rad/s b. 9.7 rad/s c. 9.3 rad/s d. 9.1 rad/s e. 8.8 rad/s
The Sun's rays strike the surface of the Earth at 90 degrees at the ____________ on December 22.
What will be an ideal response?