A parallel plate capacitor with an air dielectric is attached to a voltage source and charged. The voltage source is removed, and then the plates are separated to double their previous distance. What happens to the energy stored by the capacitor when the plates are separated?
A. it doubles
B. it quadruples
C. it halves
D. it is diminished by a factor of 4
E. it stays the same
A. it doubles
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The amplitude of a lightly damped harmonic oscillator decreases from 60.0 cm to 40.0 cm in 10.0 s. What will be the amplitude of the harmonic oscillator after another 10.0 s passes?
A) 0.00 cm B) 30.0 cm C) 26.7 cm D) 20.0 cm E) 167 cm
A race car travels 40 m/s around a banked (45° with the horizontal) circular (radius = 0.20 km) track. What is the magnitude of the resultant force on the 80-kg driver of this car?
a. 0.68 kN b. 0.64 kN c. 0.72 kN d. 0.76 kN e. 0.52 kN
A force of 15.2N directed along the positive x-axis combines with a second force to produce a total force vector of magnitude 17.9N. What is the magnitude of the second vector?
A. 2.7N B. 9.5N C. 23.5N D. Not enough information is given.
If n moles of an ideal gas are compressed isothermally from an initial volume V1 to a final volume V2, what is the change in entropy?
A.
B.
C.
D.
E.