A ball is thrown vertically upwards at 19.0 m/s. For its complete trip (up and back down to the starting position), its average velocity is:
a. 19.0 m/s.
b. 9.5 m/s.
c. 4.8 m/s.
d. 14.3 m/s
e. not given.
e
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Suppose a power plant uses a Carnot engine to generate electricity, using the atmosphere at 300 K as the low-temperature reservoir. Suppose the power plant produces 1 × 10^6 J of electricity with the hot reservoir at 500 K during Day One and then produces 1 × 10^6 J of electricity with the hot reservoir at 600 K during Day Two. The thermal pollution was
a. greatest on Day One. b. greatest on Day Two. c. the same on both days. d. zero on both days.
In his theory of relativity, Einstein revealed that the behavior we experience at low speeds could not be assumed to hold for high speeds
Indicate whether the statement is true or false
To be dimensionally consistent, velocity [L/T], pressure 
and density 
must be related as follows.
A. velocity = pressure/density
B. 
C. 
D. 
In the future, adaptive optics will greatly enhance the resolution of the Hubble Space Telescope
Indicate whether the statement is true or false