The immediate surroundings of a hot potato are simply the temperature gradient zone of the air next to the potato.
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The immediate surroundings of a hot potato are simply the temperature gradient zone of the air next to the potato.
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- Question 4: A person informs an engineer that he frequently feels cooler in the summer when standing in front of an open refrigerator. The engineer tells him that he is only “imagining things” because there is no fan in the refrigerator to blow the cool air over him. A lively argument ensues. Whose side of the argument do you take? Why?2. Which property of a system determines whether the system will be in thermal equilibrium with other systems? Universe/Environment Pressure Volume TemperatureAir treated as an ideal gas and having a specific heat at constant volume Cv=1200 j/kg.K undergoes a process. During this process, heat is observed to exit the system with an amount of 10 kJ while work is provided to the system with an amount of 23 kJ. If the initial temperature of air was 20 C, what is the final temperature of air if the mass of air undergoing the process is 0.3 Kg. Select one: O a. 59.5 C O b. 48.73 C O c. 63.4 C O d. 56.1 C
- What does it mean for an engineering device that has steady-flow? (choose 3 answers) 1- it has been operating for a long time. 2- the properties do not change with time. 3- the property values can be different at different location in the device. 4- the total energy content in the control volume remains unchanged. 5- the rate of energy coming into the system equals to the rate of energy exits the system.Latent heat of fusion is the heat given up as a substance freezes. The latentheat of fusion for water is 144 British thermal units per pound (Btu/lb). Thismeans that 144 Btu are given up for each pound of water that freezes. Howmany British thermal units of heat are given up when 4,000 pounds of waterfreeze?Air treated as an ideal gas and having a specific heat at constant volume Cv=1200 J/kg.K undergoes a process. During this process, heat is observed to exit the system with an amount of 10 k) while work is provided to the system with an amount of 24 kJ. If the initial temperature of air was 20 C, what is the final temperature of air if the mass of air undergoing the process is 0.2 Kg. Select one: O a. 81.5 C O b. 74.5 C O c. 69.5 C d. 78.3 C
- Subject: ThermodynamicsShow your solution please and givenIn a concentrated solar power plant, molten salt tank is used to store the thermal energy from the sun during the day. The tank wall thickness is 3cm containing molten salt at a temperature of 390 degree Celsius. There is atmospheric air outside the tank at a temperature of 30 degree Celsius. Suppose heat is lost as a result of heat transfer from the molten salt to the atmospheric air. What is the mode of heat transfer in this condition? conduction then convection convection then conduction convection then conduction then convection conduction then convection then conductionWhich two of the following are best correct statements for the wall with the temperature distribution shown below: A) The heat flux would be constant at any location in the wall B) It is unclear if heat is being generated within the wall C) Heat does not flow across the centerline D) Everywhere inside the wall, heat flows only to the right( same direction as the x-direction E) If the convection outside the wall is occuring with a normal magnitude of h, then it can be expected that Ts >> Tinfinity
- Matter is a substance that occupies space and has A. color. B. texture. C. temperature. D. mass.A transducer is used to convert the temperature into some physical mechanical quantities or electric voltage.b) For an Otto Engine the temperature at the end of combustion is 280 K. If the temperature in the gas side and coolant side of the wall are 177 °C and 127 °C and cylinder wall thickness is 5 mm;