A bag of potato chips contains 2.00 L of air when it is sealed at sea level at a pressure of 1.00 atm and a temperature of 20.0°C
What will be the volume of the air in the bag if you take it with you, still sealed, to the mountains where the temperature is 7.00°C and atmospheric pressure is 70.0 kPa? Assume that the bag behaves like a balloon and that the air in the bag is in thermal equilibrium with the outside air. (1 atm = 1.01 × 105 Pa)
A) 4.13 L B) 2.76 L C) 1.01 L D) 1.38 L
B
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In simple harmonic motion, when is the magnitude of the acceleration the greatest? (There could be more than one correct choice.)
A) when the kinetic energy is a minimum B) when the displacement is a zero C) when the speed is a maximum D) when the potential energy is a maximum E) when the magnitude of the displacement is a maximum
Standing-wave vibrations are set up in a crystal wine glass with four nodes and four antinodes equally spaced around the 2.80-cm radius of the rim. If the resonant frequency of the glass is 8.50 kHz, what is the speed of the transverse waves moving around the glass?
a. 1 500 m/s b. 748 m/s c. 374 m/s d. 238 m/s
Thin Films: When a beam of light that is traveling in glass strikes an air boundary at the surface of the glass, there is
A. a 90° phase change in the reflected beam. B. no phase change in the reflected beam. C. a 180° phase change in the reflected beam. D. a 60° phase change in the reflected beam. E. a 45° phase change in the reflected beam.
The circuit below contains 4 100-W light bulbs. The emf is 110 V. Which light bulb(s) is(are) brightest?
A. A B. B C. C D. D E. C and D