Thermodynamic Processes: The figure shows a pV diagram for 2.6 g of ideal helium gas that undergoes the process 1 ? 2 ? 3. Find the value of volume V3. The atomic mass of helium is 4.0 g/mol, and R = 8.31 J/mol ? K.
A. 25 L
B. 99 L
C. 50 L
D. 12 L
Answer: A
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Boat 1 goes directly across a stream a distance L and back taking a time t1 . Boat 2 goes down stream a distance L and back taking a time t2 . If both boats had the same speed relative to the water, which of the following statements is true?
a. t2 > t1 b. t2 < t1 c. t2 = t1 d. t2 = 2t1 e. t2 = 0.5t1
The temperature scale that places zero at the point where all atomic and molecular motion ceases is:
A) Fahrenheit. B) Celsius. C) Kelvin. D) centigrade. E) Ransom.
If the velocity of an object is zero, then that object cannot be accelerating
A) True B) False
Thin Lenses: A seed is 15 mm in front of a converging lens, and the image of the seed is 4.0 mm behind the lens. What is the focal length of the lens?
A. 11 mm B. 5.5 mm C. 3.8 mm D. 3.2 mm