The population of the United States is approximately 290,000,000. Write this in scientific notation.
a. 
b. 
c. 
d. 
d.
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The daytime sky is blue, on sunny days, because the atmosphere
A. absorbs the red light. B. absorbs blue light. C. is more efficient at scattering blue light. D. is most efficient at scattering red light. E. contains small amounts of water vapor that give the air its blue color.
A wheel rotating about a fixed axis has an angular position given by q = 3.0 - 2.0t3, where q is measured in radians and t in seconds. What is the angular acceleration of the wheel at t = 2.0 s?
a. -1.0 rad/s2 b. -24 rad/s2 c. -2.0 rad/s2 d. -4.0 rad/s2 e. -3.5 rad/s2
A 3.00-kg stone is dropped from a 39.2 m high building. When the stone has fallen 19.6 m, the magnitude of the impulse it has received from the gravitational force is
a. 9.80 N s. b. 19.6 N s. c. 29.4 N s. d. 58.8 N s. e. 118 N s.
The lower limit for a main sequence star is _______________ solar masses
Fill in the blank(s) with correct word