SINCE THE ONLY CUP OF WATER IN THE FRIDGE WAS FROZEN, YOU DECIDE TO DRINK HOT...
SINCE THE ONLY CUP OF WATER IN THE FRIDGE WAS FROZEN, YOU DECIDE TO DRINK HOT TEA INSTEAD. A CLOSED ALUMINUM THERMOS CONTAINED 1L OF HOT 98 ºC TEA. A. LIKE A GENIUS, YOU DROP THE ALUMINUM THERMOS INTO A COLD 5 ºC SINK. IF THE THICKNESS OF THE THERMOS WAS 25 mm (0.025m) AND THE AREA EXPOSED WAS 0.08m2, what is the rate of heat flow leaving the hot tea due to conduction? B. IF THE EMISSIVITY OF ALUMINUM IS 0.01, what is the rate of the heat flow leaving the hot tea due to radiation?
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SINCE THE ONLY CUP OF WATER IN THE FRIDGE WAS FROZEN, YOU DECIDE
TO DRINK HOT...
You just made a cup (0.3 liters) of coffee, but it is too hot to drink....
You just made a cup (0.3 liters) of coffee, but it is too hot to drink. You wish to decrease the temperature of the tea from 72°C down to 64"C by submerging a numoer or aluminusp hcffefthe snd owever, instead o temperature (25°C), then how many spoons will be required to decrease the coffee to the optimum temperature? 5 spoons Assume: Cp for coffee 4184 Cp for aluminum 921 density of coffee= 1000 kg/m no heat loss from the cup...
A hot cup of black coffee (85°C) is placed on a tabletop (22°C) where it remains....
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You just made a cup (0.3 liters) of coffee, but it is too hot to drink. You wish to decrease the temperature of the tea from 72°C down to 64"C by submerging a numoer or aluminusp hcffefthe snd owever, instead o temperature (25°C), then how many spoons will be required to decrease the coffee to the optimum temperature? 5 spoons Assume: Cp for coffee 4184 Cp for aluminum 921 density of coffee= 1000 kg/m no heat loss from the cup...
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