Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
a. the pressure is inversely proportional to the volume at constant temperature. b. the temperature is directly proportional to the volume at constant pressure. c. the temperature is directly proportional to the pressure at constant volume. d. all the statements above are found to be correct.
e. only statements (a) and (b) are found to be correct.
D
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Series/Parallel Circuits: What is the magnitude of the potential difference between points B and C for the circuit shown in the figure? The battery is ideal, and all the numbers are accurate to two significant figures.
A. 6.0 V B. 4.0 V C. 3.0 V D. 2.0 V
The geological feature in this photo is
A) an impact crater. B) a volcano. C) the unusual cloud formation in the background. D) a dried up lake basin.
The speed of Halley's comet, while traveling in its elliptical orbit around the sun,
A) decreases as it nears the sun. B) increases as it nears the sun. C) is zero at two points in the orbit. D) is zero at four points in the orbit. E) is constant.
A long solenoid (1500 turns/m) carries a current of 20 mA and has an inside diameter of 4.0 cm. A long wire carries a current of 2.0 A along the axis of the solenoid. What is the magnitude of the magnetic field at a point that is inside the solenoid and 1.0 cm from the wire?
a. 78 ?T b. 55 ?T c. 48 ?T d. 68 ?T e. 2.0 ?T