For an ideal gas of a given mass, if the pressure remains the same and the volume decreases:
a. the average kinetic energy of the molecules decreases.
b. the average kinetic energy of the molecules stays the same.
c. the average kinetic energy of the molecules increases.
d. Nothing can be determined about the molecular kinetic energy.
A
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Energy in Capacitors: An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery that maintains a constant potential difference across the plates. If the separation between the plates is now doubled, the amount of electrical energy stored on the capacitor will
A. double. B. quadruple. C. be cut in half. D. be cut in fourth. E. not change.
Two children are riding on a merry-go-round. Child A is at a greater distance from the axis of rotation than child B. Which child has the larger angular displacement?
A) Child A B) Child B C) They have the same zero angular displacement. D) They have the same non-zero angular displacement. E) There is not enough information given to answer the question.
The velocity of a particle as a function of time is given by v(t) = (2.3 m/s) + (4.1 m/ s2 )t - (6.2 m/ s3 )t2. What is the average acceleration of the particle between t = 1.0 s and t = 2.0 s?
A) -13 m/ s2 B) -15 m/ s2 C) 13 m/ s2 D) 15 m/ s2 E) 0 m/ s2
Two objects have masses m and 5m, respectively. They both are placed side by side on a frictionless inclined plane and allowed to slide down from rest
A) It takes the lighter object 5 times longer to reach the bottom of the incline than the heavier. B) It takes the lighter object 10 times longer to reach the bottom of the incline than the heavier. C) It takes the heavier object 5 times longer to reach the bottom of the incline than the lighter. D) It takes the heavier object 10 times longer to reach the bottom of the incline than the lighter. E) The two objects reach the bottom of the incline at the same time.