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    A small immersion heater is rated at 380 W. Estimate how long it will take to heat a cup of soup (assume this is 295 mL of water) from 18.2oC to 48.4oC.

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    The power of the heater in Watts (P), indicates how many Joules the heater produces in one second.

    Thus the total energy the heater produces in time t is:

    W = Pt

    The heat flowing into the water Q, causes ...

    Solution Summary

    This solution estimates how long it will take to heat a cup of soup from 18.2oC to 48.4oC.