8) Two steel spheres are made of the same material and have the same diameter, b

Question

8) Two steel spheres are made of the same material and have the same diameter, but one is solid and the other is hollow. If their temperature is increased by the same amount A) the solid sphere becomes bigger than the hollow one. B) the hollow sphere becomes bigger than the solid one. C) the two spheres remain of equal size. D) the solid sphere becomes heavier and the hollow one becomes lighter E) the solid sphere becomes lighter and the hollow one becomes heavier. 9) When a solid melts A) the temperature of the substance increases. B) the temperature of the substance decreases. C) heat energy leaves the substance D) heat energy enters the substance. E) None of the above. 10) A sample of an ideal gas is slowly compressed to one-half its original volume with no change in pressure. If the original root-mean-square speed (thermal speed) of the gas molecules was V, the new speed is A) V B) 2V. D) V/2. VN2 11) When a gas undergoes an isothermal process, there is A) no change in the pressure of the gas. B) no change in the temperature of the gas. C) no change in the volume of the gas. D) no work done by (or on) the gas. E) no heat added to the gas. 12) An ideal gas is compressed in a well-insulated chamber using a well-insulated piston. This process is A) isochoric. B) isothermal. C) adiabatic. D) isobaric. E) isometric.

Explanation / Answer

Solution:

8.) Ans: C - the two spheres remains of equal size.

9.) Ans: D - heat energy enters the substance

10.) Ans: A - V It does not change.

11.) Ans: B - no change in the temparature of gas.

12.) Ans: C - adiabatic.

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