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Physics, 18.03.2021 01:10 baileyann3342
I would be so happy If a lightbulb takes in 50 W of power but only gives out 25 W of light, how efficient is it?
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12. ritu obtained a distinct image of a distant tree on the screen with the of a concave mirror.to find the focal length of the mirror she has to measure the distance between: (a) mirror and the tree. (b) screen and the tree.(c) mirror and the screen. (d) mirror and tree as well as between screen and the tree.
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I would be so happy
If a lightbulb takes in 50 W of power but only gives out 25 W of light, how eff...
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