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College Physics
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ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Several schematic diagrams of heat flow processes are shown. Indicate whether each diagram represents a physically possible or a physically impossible process.
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Он
TH
Он
Q'H
Он
TH
W
W
W
Tc
Tc
Tc"
Transcribed Image Text:TH
Он
TH
Он
Q'H
Он
TH
W
W
W
Tc
Tc
Tc
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- Several schematic diagrams of heat flow processes are shown. Indicate whether each diagram represents a physically possible or a physically impossible process. TH FIIE Tu TH Answer Bank impossible possible Te Te Te Te TH Tu TH W W Te Te Te Tearrow_forward4) A ground source heat pump heats a building by extracting heat from the ground and pumping it into the building. Define: Qc = heat extracted from the ground, Qn= heat pumped into the building, W = electric energy used by the heat pump, Tc= temperature of the ground, T = temperature of building (Qc, Qn, and W are positive by definition). Assume Tr > Tc. a) Draw a diagram showing energy flow in and out of the heat pump. b) Write a general expression for the change AS in the entropy of the "universe", that is the heat pump plus the cold and hot reservoirs, in terms of the quantities defined above. Now assume ideal (reversible) operation, and take Te= 10 °C and Tp= 20 °C. What is the coefficient of performance (ČOP) of the heat pump? By what factor would this change if we had Tc = 0 °C instead?arrow_forwardA rectangular painting measures 1.00 m tall and 1.50 m wide, Fig. a. It is hung on the side wall of a spaceship which is moving past the Earth at a speed of 0.90c. (a) What are the dimensions of the picture according to the captain of the spaceship? (b) What are thedimensions as seen by an observer on the Earth? (L=L0*√1 − (?)2 )arrow_forward
- i dont understand thisarrow_forwardA system undergo a process consisting of the following two steps Step 1: The system absorbs 48 J of heat while 24 J of work is done on it Step 2: The system absorbs 24 J of heat while performing 48 J of work Calculate E for the overall process.arrow_forwardThere are three mechanisms by which heat can be transferred from one place to another. List these mechanisms and, for each one, provide (and briefly justify) an example of a kitchen appliance which uses the mechanism to heat food.arrow_forward
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