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The burning wood inside a woodstove has temperature of 1000 C and radiates heat at a...

The burning wood inside a woodstove has temperature of 1000 C and radiates heat at a power of P. After some time, the temperature drops to 200C, what is the radiation heat power now?

If the amplitude of a pendulum is increased by a factor of two but remains small. The period of the pendulum’s oscillation


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