What event triggered the dramatic increase in atmospheric carbon dioxide concentration seen over the last couple of centuries?
A) the invention of CFCs
B) the invention of the automobile
C) the Tunguska meteoric impact
D) the volcanic eruption in Iceland in 1783
E) the Industrial Revolution
E
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Video 2 (Chapter 19): If you have a short focal length converging lens what can be said about the power of the lens?
A. The power is large and positive B. The power is small and positive C. The power is small and negative D. The power is large and negative.
The chromosphere is red because it is hot enough to ________ hydrogen atoms
Fill in the blank(s) with correct word
A marble moving 1.48 m/s rolls off the top edge of a 125-cm high table in a room where there is no appreciable air resistance and the free-fall acceleration is 9.80 m/s2. Neglect effects of air
(a) How far from the base of the table will it strike the floor? (b) How long will it be in the air?
Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
a. the pressure is inversely proportional to the volume at constant temperature. b. the temperature is directly proportional to the volume at constant pressure. c. the temperature is directly proportional to the pressure at constant volume. d. all the statements above are found to be correct. e. only statements (a) and (b) are found to be correct.