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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