According to the following figure, the different layers of Earth's atmosphere are defined by
a. how the temperature varies with altitude.
b. how the pressure varies with altitude.
c. how the density varies with altitude.
d. different temperature ranges.
e. different pressure ranges.
a. how the temperature varies with altitude.
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Length Contraction: Astronaut Sarah leaves Earth in a spaceship at a speed of 0.280c relative to Earth. Sarah's destination is a star system 12.5 light-years away (one light-year is the distance light travels in one year). According to Sarah, how far did she travel during the trip?
A. 13.0 light-years B. 12.5 light-years C. 12.0 light-years D. 11.5 light-years E. 11.0 light-years
A 5.00-kg object is lifted from the floor to a shelf. The object's new gravitational potential energy relative to the floor is 102 J. What is the height of the shelf?
The quantity that is quantized in the oscillating atoms of a blackbody is
a. angular momentum b. energy c. the emission spectrum d. the absorption spectrum e. the wave function
If a convex lens were made out of very thin clear plastic filled with air, and were then placed underwater where n = 1.33 and where the lens would have an effective index of refraction n = 1, the lens would act in the same way
a. as a concave mirror in air. b. as a concave lens in air. c. as a convex lens in air. d. as a flat refracting surface between water and air as seen from the water side. e. as the glasses worn by a farsighted person.