A real gas undergoes a process that can be represented as a curve on a p-V diagram. The work done by the gas during this process is:
A. pV
B. p(V2 ? V1)
C. (p2 ? p1)V
D. $ p dV
E. V dp
Answer: D. $ p dV
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A steel alloy that has an initial carbon concentration of 0.1 weight %carbon is to be case-hardened by packing it in carbon that maintains a surface concentration of 1 weight %carbon at 1000°C. After 11.8 hours the carbon concentration is 0.5 weight % at a depth of 1 mm into the steel. What time is required to obtain a carbon concentration of 0.5 weight %at a depth of 2 mm into the steel?
What will be an ideal response?
In attempting to pipe water to elevated heights, ______________ investigated atmospheric pressure
a. Newton b. Galileo c. Bergeron d. Torricelli
Compared to a 1-kg block of solid iron, a 2-kg block of solid iron has the same
A) mass. B) volume. C) weight. D) all of the above E) none of the above
You can swing your legs to and fro more frequently when your legs are
A) straight. B) bent. C) same either way