Geography

Geography, 17.08.2019 06:10, brooklym2940

Some hot water was added to 3times the mass of cold water at 10 centigrad and resultant tem was found to be 20cetigrade what was th temperature of hot water

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Chemistry, 24.09.2019 21:00, kasier4600

Internal energy change (note: you will need appendix a6 for this problem). a. how much energy in joules) must be added to 90 gallons of water at 25 °c and 1 atmosphere (1.0133 bar) to raise its temperature to 94°c? b. how much energy should be added to 90 gallons of 25 °c water at 0.51 bar to raise its temperature to 94°c? c. how much energy should be added to 90 gallons of 25°c water at 21.83 bar to raise its temperature to 94°c? d. how much energy should be added to the same mass of water at 25 °c and 0.0099 bar to raise its temperature to 94 °c? note: you'll need density values. these can be found in the steam tables (appendix a.6) under the column specific volume (m/kg). v is the specific volume of liquid water, v, for water vapor. the value of vis multiplied by 10%, meaning that the specific volume of water at 273.15 k is 1.000 * 10 mº/kg. density is the inverse of specific volume.

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Physics, 07.10.2019 16:20, ineedhelpireallydo

Returning to the scene of the (possible) crime, you estimate that the bathtub in which polly was found contained around 0.3 m3 (around 80 gallons), which corresponds to 300 kg (since the density of water is 1000 kg/m3), of water as you scoop the water out of the tub. the temperature of this water is 7oc. you assume that the water was initially at its lowest temperature, 2oc, which you find by turning on the cold tap only. with these measurements, first determine the amount of heat that transferred from polly and the external environment to warm the cold water. the specific heat of water is about 4186 j/(kgoc). give your answers in units of kilojoules (kj).

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Physics, 24.10.2019 17:43, isiss18

Consider a water-to-water counter-flow heat exchanger with these specifications. hot water enters at 90 oc while cold water enters at 20 oc. the exit temperature of hot water is 15 oc greater than that of cold water. the product of heat transfer surface area and the overall heat transfer coefficient is 3300 w/k. taking the specific heat of both cold and hot water to be cp = 4190 j/kg.k, determine (a) the outlet temperature of the cold water, (b) the effectiveness of the heat exchanger, (c) the mass flow rate of the cold water, and (d) the heat transfer rate

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Physics, 31.10.2019 01:31, niasheffield65

The temperature of 1.94 kg of water is 34 °c. to cool the water, ice at 0°c is added to it. the desired final temperature of the water is 11 °c. the latent heat of fusion for water is 33.5 × 10^4 j/kg, and the specific heat capacity of water is 4186 j/(kg·c°). ignoring the container and any heat lost or gained to or from the surroundings, determine how much mass m of ice should be added?

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Some hot water was added to 3times the mass of cold water at 10 centigrad and resultant tem was foun...

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