In the upper atmosphere at altitudes where commercial airlines travel, we find extremely cold temperatures. What is the speed of sound (in metric units) for a temperature of -53.0 oC?
298.1 m/s
Physics & Space Science
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Why might the presence of a giant planet be both good and bad news for life on a terrestrial planet in another solar system?
What will be an ideal response?
Physics & Space Science
What is the kinetic energy of a 200-kg satellite as it follows a circular orbit of radius 8.0 × 106 m around the Earth? (Mass of Earth = 6.0 × 1024 kg.)
A. 5.0 × 109 J B. 1.0 × 1010 J C. 1.5 × 1010 J D. 2.0 × 1010 J E. 2.5 × 109 J
Physics & Space Science
A sample of an ideal gas has a volume of 0.0100 
a pressure of 
Pa, and a temperature of 300 K. What is the number of moles in the sample of gas?
A. 0.302 B. 0.330 C. 0.375 D. 0.401 E. 0.502
Physics & Space Science
Sounds from musical instruments are produced by
A) vibrating strings. B) vibrating air columns. C) percussion. D) all of the above E) none of the above
Physics & Space Science