Thermodynamic Processes: The figure shows a pV diagram for 2.9 g of ideal oxygen gas O2 in a sealed container. The temperature of state 1 is 76°C, the atomic mass of the oxygen atom is 16 g/mol, and R = 8.31 J/mol ? K. What are the temperatures T3 and T4?
A. -11°C and 510°C
B. 57°C and 170°C
C. 260°C and 790°C
D. 38°C and 110°C
Answer: A
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A box sits at rest on an inclined plank. How do the magnitudes of the normal force and the gravitational force exerted on the box compare? (Hints: What is the box’s acceleration? Draw a free-body diagram!)
A. 
B. 
C. 
D. 
E. We do not have enough information to answer.
If the velocity of an object is zero at one instant, what is true about the acceleration of that object? (There could be more than one correct choice.)
A) The acceleration could be positive. B) The acceleration could be negative. C) The acceleration could be zero. D) The acceleration must be zero.
What is the number of moles of H2O produced if you combust 0.5 mole of CH4 according to the following balanced equation?
CH4 + 2 O2 ? CO2 + 2 H2O A) 2 moles B) 4 moles C) 6 moles D) 8 moles E) 1 mole
A satisfactory model of the transverse strength of uniaxial composite materials is to assume that the fibers are _________in the composite material.
Fill in the blank(s) with the appropriate word(s).