Which of the Jovian planets is tilted by about 90 degrees to its orbital plane?
A. Saturn
B. Uranus
C. Jupiter
D. Neptune
Answer: B
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A string is wound tightly around a fixed pulley whose radius is 5.0 cm. As the string is pulled, the pulley rotates without slipping. What is the angular speed of the pulley when the string has a linear speed of 5.0 m/s?
A) 100 rad/s B) 50 rad/s C) 25 rad/s D) 20 rad/s E) 10 rad/s
Which of the following best characterizes electrical conductors?
a. low mass density b. high tensile strength c. electric charges move freely d. poor heat conductors
A parachutist of mass 50.0 kg jumps out of an airplane at a height of 1 040 m. The parachute deploys, and she lands on the ground with a speed of 4.0 m /s. How much energy was lost to air friction during this jump?
a. 4.0E+2 J b. 8.2E+4 J c. 4.3E+5 J d. 5.1E+5 J e. 6.4E+5 J
Which of the following rocks is not a sedimentary rock?
a. Shale b. Sandstone c. Marble d. Conglomerate