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Physics, 29.11.2019 00:31, nothingworksoutforme
Atub containing 53 kg of water is placed in a farmer's canning cellar, initially at 10∘c. on a cold evening the cellar loses thermal energy through the walls at a rate of 1200 j/s. without the tub of water, the fruit would freeze in 4 h (the fruit freezes at −1∘c because the sugar in the fruit lowers the freezing temperature). part a by what time interval does the presence of the water delay the freezing of the fruit? the specific heat of water is c = 4180 j/kg⋅∘c.
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Physics, 22.06.2019 21:30, katwright1124
Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?
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Atub containing 53 kg of water is placed in a farmer's canning cellar, initially at 10∘c. on a cold...
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