If you wish to keep chicken warm in a shed on a cold night, the best lamp to use is
A) an incandescent lamp.
B) a fluorescent lamp.
C) an LED lamp.
D) a CFL lamp.
Answer: A
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Applying the Tragedy of the Commons principle to the human population of Earth, we might phrase it "population growth and consumption benefit the few, while the costs are borne by all of society
" What evidence is there supporting this view? What evidence is there contradicting this view?
Solar energy
a. is a recent invention b. has been used for a long time c. has not yet been successfully developed d. is indirectly the source of most of the energy we use
Slanting Surfaces With Friction: A flatbed truck is carrying a 20-kg crate up a sloping road. The coefficient of static friction between the crate and the bed is 0.40, and the coefficient of kinetic friction is 0.30. What is the maximum angle of slope that the truck can climb at constant speed if the crate is to stay in place?
A. 0.38° B. 13° C. 17° D. 22° E. 68°
In deriving the axial electric field for the ring-shaped charge distribution and the electric field from a long line of charge, the component perpendicular to the resulting field is zero because of what physical property?
A) only net charge is important B) positive and negative charges cancel C) superposition D) integration E) symmetry