What is the speed of sound in air at a temperature of –110 °F?
a. 279 m/s
b. 407 m/s
c. 256 m/s
d. 3 470 m/s
a
Physics & Space Science
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Which of the following is not a greenhouse gas?
A) oxygen (O2) B) carbon dioxide (CO2) C) methane (CH4) D) water vapor (H2O)
Physics & Space Science
Refraction is
A. The 'bouncing' of light off a surface B. The disappearance of light in a medium C. The bouncing of light off impurities in the medium D. The change of direction of light as it moves from one medium into another
Physics & Space Science
______________is an alloy of copper and tin.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
Kepler's second law of planetary motion states "A line from a planet to the Sun sweeps over equal areas in equal intervals of ____."
a. time b. space c. arcs d. ellipses e. spheres
Physics & Space Science