Without greenhouse gases, Earth's surface would be frozen over
Indicate whether the statement is true or false
TRUE
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The pitch of a guitar relates to the string's
A) length. B) tension. C) mass. D) all the above E) none of the above
The term "dirty bomb" refers to
A) a bomb that uses conventional explosive to disperse radioactive materials. B) a conventional chemical bomb that disperses pieces of metal in order to harm the maximum number of people. C) a nuclear device that is optimized for the release of radioactive materials. D) a nuclear device that releases neutrons in order to kill people without harming buildings and other structures. E) any nuclear device that is used for terrorist purposes.
Angular Momentum: A uniform, solid, cylindrical flywheel of radius 1.4 m and mass 15 kg rotates at 2.7 rad/s. What is the magnitude of the flywheel's angular momentum?
A. 40 kg ? m2/s B. 20 kg ? m2/s C. 80 kg ? m2/s D. 60 kg ? m2/s
A sound source emits 30.0 W of sound power spread equally in all directions. What is the sound intensity level 30.0 m from the source?
A) 94.2 dB B) 83.2 dB C) 2.65 × 10-3 dB D) 2.65 × 10-3 W E) -25.8 dB