The energy attributed to an object by virtue of its motion is known as
A) potential energy.
B) kinetic energy.
C) radiative energy.
D) mass-energy.
B
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The plates of a parallel-plate capacitor are maintained with constant voltage by a battery as they are pulled apart. During this process, the amount of charge on the plates must
A) increase. B) decrease. C) remain constant. D) either increase or decrease. There is no way to tell from the information given.
A common scale for denoting a mineral's hardness is the
a. Ores scale. b. Mohs scale. c. Homs scale. d. Ohms scale.
A uniform solid disk is released from rest and rolls without slipping down an inclined plane that makes an angle of 25° with the horizontal. What is the forward speed of the disk after it has rolled 3.0 m, measured along the plane?
A) 2.0 m/s B) 3.5 m/s C) 4.1 m/s D) 5.7 m/s E) 6.3 m/s
Is the acceleration due to gravity always pointing vertically downward even for an object whose velocity is vertically upward? Explain your answer