Problem 5: On a hot day, the freezers in a particular ice cream shop maintain an average temperature of T = -18° C while the temperature of the surroundings is Th=29° C. Randomized Variables T₂ = -18° C Th=29° C Part (a) Calculate the maximum coefficient of performance COP for the freezers. COPC -5.400 ✓ Correct! sin() cos( cotan() asin()) atan() tan() acos() sinh() acotan() cosh() tanh() cotanh() Degrees O Radians At₂ = I ( ET Th Part (b) If the work input to the freezer is W = 2.3 kJ and the freezer actually removes Qc = 13.6 × 10³ J from the ice cream each second, what is the real coefficient of performance? COP-5.910 ✓ Correct! Part (c) An employee puts m = 1.15 kg of melted ice cream at To=4.5° C into the freezer. Assuming that the ice cream freezes at T₁ = -1.0° C, how long in seconds will it take for the ice cream to reach its freezing temperature? Take the specific heat capacity of the melted ice cream as c = 4,000.0 J/(kg-K). Af₁ = 7 8 9 HOME 4 5 6 Tc * 1 2 3 + 0 END NO BACKSPACE DEL CLEAR 2 Qc Part (d) Assuming a latent heat of fusion of L= 280 kJ/kg, how long. At₂, in seconds does it take to freeze the ice cream? W

Problem 5: On a hot day, the freezers in a particular ice cream shop maintain an average temperature of T = -18° C while the temperature of the surroundings is Th=29° C. Randomized Variables T₂ = -18° C Th=29° C Part (a) Calculate the maximum coefficient of performance COP for the freezers. COPC -5.400 ✓ Correct! sin() cos( cotan() asin()) atan() tan() acos() sinh() acotan() cosh() tanh() cotanh() Degrees O Radians At₂ = I ( ET Th Part (b) If the work input to the freezer is W = 2.3 kJ and the freezer actually removes Qc = 13.6 × 10³ J from the ice cream each second, what is the real coefficient of performance? COP-5.910 ✓ Correct! Part (c) An employee puts m = 1.15 kg of melted ice cream at To=4.5° C into the freezer. Assuming that the ice cream freezes at T₁ = -1.0° C, how long in seconds will it take for the ice cream to reach its freezing temperature? Take the specific heat capacity of the melted ice cream as c = 4,000.0 J/(kg-K). Af₁ = 7 8 9 HOME 4 5 6 Tc * 1 2 3 + 0 END NO BACKSPACE DEL CLEAR 2 Qc Part (d) Assuming a latent heat of fusion of L= 280 kJ/kg, how long. At₂, in seconds does it take to freeze the ice cream? W

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

Problem 5: On a hot day, the freezers in a particular ice cream shop maintain an average
temperature of T = -18° C while the temperature of the surroundings is T = 29° C.
Randomized Variables
T₂ = -18° C
Th=29° C
Part (a) Calculate the maximum coefficient of performance COP for the freezers.
✓ Correct!
COPC=5.400
sin()
cos
cotan() asin()
atan() acotan()
cosh()
tan()
acos() E
sinh()
tanh() cotanh()
Degrees O Radians
Part (b) If the work input to the freezer is W = 2.3 kJ and the freezer actually removes Qc = 13.6 × 10³ J from the ice cream each second, what is the real
coefficient of performance?
COP = 5.910
✓ Correct!
Part (c) An employee puts m = 1.15 kg of melted ice cream at To=4.5° C into the freezer. Assuming that the ice cream freezes at T₁ = -1.0° C, how long
in seconds will it take for the ice cream to reach its freezing temperature? Take specific heat capacity of the melted ice cream as c = 4,000.0 J/(kg.K).
At₁ =
(
7 8 9
4 5
1 2 3
0
sin() cos(
cotan() asin()
atan() acotan
cosh()
NO BACKSPACE
HOME
END
CLEAR
4
5 6
tan() It ( 7 8 9
acos() E ^^^
sinh()
tanh() cotanh()
Degrees O Radians
1
2 3
+
0
NO BACKSPACE
Th
Te
Part (d) Assuming a latent heat of fusion of L= 280 kJ/kg. how long. At₂, in seconds does it take to freeze the ice cream?
At₂ =
HOME
2₁
END
CLEAR
Qc
W

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Step 4: c) Calculate time taken to reach freezing temperature:

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Step 5: d) Calculate time taken to freeze:

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