Physics, 06.03.2021 03:00 caitybugking
You want to prepare cold apple juice for your family. Unfortunately, you forgot to put the apple juice in the refrigerator, so you have 1.94 L of apple juice at room temperature: 22.3°C. You want to immediately cool it by adding ice cubes from your freezer to the juice, so that you end up with only liquid at 0°C to serve your family. You are not concerned with "watering down" the apple juice; your family will still enjoy it! The ice cubes are at temperature −18.4°C when taken from the freezer. After explaining this to a family member, she challenges you to determine exactly how much ice (in kg) you need to achieve your desired equilibrium temperature. Assume that the specific heat of apple juice is 4186 J/kg · °C, the specific heat of ice is 2090 J/kg · °C and the density of apple juice is 1,000 kg/m3.
Answers: 3
Physics, 22.06.2019 13:30, brsglover8355
6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.
Answers: 2
Physics, 22.06.2019 17:40, yoongnzl
Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.
Answers: 1
Physics, 22.06.2019 21:00, brittneys55
What is the efficiency of an engine that does 80 j of work and exhausts 320 j of heat while taking in 400 j of heat ? a. 10% b. 20% c. 80% d. 25%
Answers: 1
You want to prepare cold apple juice for your family. Unfortunately, you forgot to put the apple jui...
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