The units of specific heat are
a. kcal-kg/°C.
b. J/kg-°C.
c. kcal-kg.
d. J/kg.
b
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The twisting of the axis of rotation combined with the rotation of an object causes _____
A) culmination B) precession C) conjunction D) libration
Using a camera with a fixed focal length lens, how will increasing the f-number affect the depth of focus and the intensity of the light reaching the ccd (or film)?
a. The depth of focus will decrease but the intensity of light reaching the ccd will increase. b. The depth of focus will increase as will the intensity of light reaching the ccd. c. The depth of focus will increase but the intensity of light reaching the ccd will decrease. d. The depth of focus will decrease as will the intensity of light reaching the ccd.
Strictly speaking, if any electrical device in an automobile is turned on (such as an air conditioner or even headlights), more fuel is consumed by the engine. This statement is
A) true. B) true only if the engine is running. C) always false. D) sometimes true, sometimes false.
Suppose XL > XC in the figure below and, with both switches open, a piece of iron is slipped into the inductor. During this process, what happens to the brightness of the bulb?