The 1986 Susan Solomon expedition
A) discovered that the sun's infrared is significantly absorbed by carbon dioxide.
B) confirmed that fossil fuels are causing global warming.
C) discovered that solar radiation is most energetic at the frequency of yellow-green light.
D) confirmed that rain-forest destruction is a significant contributor to ozone depletion.
E) confirmed that CFCs are causing ozone depletion over Antarctica.
E
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An incompressible fluid is flowing through a vertical pipe with a constriction. The wide section is 2.00 cm in diameter and is at the top of the pipe. The pressure of the fluid in the wide section at the top is 200 kPa. The velocity of the fluid in the wide section is 4.00 m/s. The narrow section is located 4.00 m below the wide section. What is the diameter of the narrow section for the pressure of the fluid in the narrow section to equal the pressure in the wide section? (density of the fluid is 680 
A. 1.50 cm B. 1.43 cm C. 1.36 cm D. 1.28 cm E. 1.15 cm
Identical particles are placed at the 50-cm and 80-cm marks on a meter stick of negligible mass. This rigid body is then mounted so as to rotate freely about a pivot at the 0-cm mark on the meter stick. If this body is released from rest in a horizontal position, what is the angular speed of the meter stick as it swings through its lowest position?
A. 4.2 rad/s B. 5.4 rad/s C. 4.6 rad/s D. 5.0 rad/s E. 1.7 rad/s
Two cars are traveling around identical circular racetracks. Car A travels at a constant speed of 20 m/s. Car B starts at rest and speeds up with constant tangential acceleration until its speed is 40 m/s. When car B has the same (tangential) velocity as car A, it is always true that:
a. it is passing car A. b. it has the same linear (tangential) acceleration as car A. c. it has the same centripetal acceleration as car A. d. it has the same total acceleration as car A. e. it has traveled farther than car A since starting.
Cave formation in limestone does not involve
A) mildly acidic groundwater. B) dissolution of carbonate rocks. C) land subsidence. D) a dropping water table.