The energy used by a 100 watt light bulb in 1 hour is __________
Fill in the blank(s) with correct word
360,000 J
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Spherical Mirrors: An object that is 2.0 cm tall is placed at the center of curvature in front of a concave mirror. How tall is its image?
A. 0.50 cm B. 1.0 cm C. 1.5 cm D. 2.0 cm E. infinite
One possible ingredient of dark matter is known as WIMPs, or weakly interacting massive particles. Our best guess is that WIMPs probably are made of protons and neutrons
Indicate whether the statement is true or false
Joe and Bill throw identical balls vertically upward. Joe throws his ball with an initial speed twice as high as Bill. If there is no air resistance, the maximum height of Joe's ball will be
A) four times that of Bill's ball. B) two times that of Bill's ball. C) equal to that of Bill's ball. D) eight times that of Bill's ball. E) roughly 1.4 times that of Bill's ball.
In a greenhouse, electromagnetic energy in the form of visible light enters the glass panes and is absorbed and then reradiated. What happens to this reradiated electromagnetic radiation from within the greenhouse?
a. 100% returns to the atmosphere. b. It's partially blocked by glass. c. It's transformed into ultraviolet upon striking the glass. d. It's reflected as visible light upon striking the glass.