A space station of diameter 80 m is turning about its axis at a constant rate. If the acceleration of the outer rim of the station is 2.5 m/s2, what is the period of revolution of the space station?
a. 22 s
b. 19 s
c. 25 s
d. 28 s
e. 40 s
c
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The strength of low-carbon steel used in automobile bodies is achieved by ______________forming.
Fill in the blank(s) with the appropriate word(s).
The equation of continuity is a statement of which conservation rule applied to fluids in steady laminar flow?
A) conservation of area B) conservation of volume C) conservation of energy D) conservation of momentum E) conservation of mass
A liquid boils when its vapor pressure
A) equals the equilibrium vapor pressure. B) equals the external pressure. C) exceeds the external pressure. D) is between the equilibrium vapor pressure and the external pressure. E) None of the other choices is correct.
At Earth's surface what is the direction of the air flow between a high- and low-pressure cell? What is the direction aloft?