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Q. A space station, in the form of a wheel 119 m in diameter, rotates to provide an "artificial gravity" of 3.80 m/s2 for persons who walk around on the inner wall of the outer rim. Find the rate of the wheel's rotation in revolutions per minute that will produce this effect.

Q. Suppose 12.0 g of oxygen (O2) gas is heated at constant atmospheric pressure from

(a) How many moles of oxygen are present? (See Table 19-1 in the book for the molar mass.)

(b) How much energy is transferred to the oxygen as heat? (The molecules rotate but do not oscillate.)

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