The energy from the sun is created by
A. Nuclear fission
B. Nuclear fusion
C. Light waves
B. Nuclear fusion
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If you plug a 110-V electric toaster into a 220-V outlet, current in the toaster will be about
A) half what is should be. B) the same as if it were plugged into a 110-V outlet. C) more than twice what it should be. D) twice what it should be.
A one-way mirror works because its surfaces are half-silvered
a. True b. False Indicate whether the statement is true or false
A solar panel measures 80 cm × 57 cm. In direct sunlight, the panel delivers 3.1 A at 15 V. If the intensity of sunlight is 1 000 W/m2, what is the efficiency of the solar panel in converting solar energy into electrical energy?
a. 20% b. 15% c. 10% d. 5% e. 8%
As a wave-generating object moves through a medium, the waves ahead
A) bunch up. B) stretch out. C) neither of these