The claim of the inventor on the refrigerator’s coefficient of performance, β = 10 .

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Answer 1

Question

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

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2 A metal block of mass m = 10 kg is sliding along a frictionless surface with an initial speed Vo, as indicated below. The block then slides above an electromagnetic brake that applies a force FEB to the block, opposing its motion. The magnitude of the electromagnetic force varies quadratically with the distance moved along the brake (x): 10 FEB = kx², with k = 5 N m² V₁ = 8 m/s m = 10 kg FEB Frictionless surface Electromagnetic brake ⇒x Determine how far the block slides along the electromagnetic brake before stopping, in m.

Q1: Determine the length, angle of contact, and width of a 9.75 mm thick leather belt required to transmit 15 kW from a motor running at 900 r.p.m. The diameter of the driving pulley of the motor is 300 mm. The driven pulley runs at 300 r.p.m. and the distance between the centers of two pulleys is 3 meters. The density of the leather is 1000 kg/m³. The maximum allowable stress in the leather is 2.5 MPa. The coefficient of friction between the leather and pulley is 0.3. Assume open belt drive.

5. A 15 kW and 1200 r.p.m. motor drives a compressor at 300 r.p.m. through a pair of spur gears having 20° stub teeth. The centre to centre distance between the shafts is 400 mm. The motor pinion is made of forged steel having an allowable static stress as 210 MPa, while the gear is made of cast steel having allowable static stress as 140 MPa. Assuming that the drive operates 8 to 10 hours per day under light shock conditions, find from the standpoint of strength, 1. Module; 2. Face width and 3. Number of teeth and pitch circle diameter of each gear. Check the gears thus designed from the consideration of wear. The surface endurance limit may be taken as 700 MPa. [Ans. m = 6 mm; b= 60 mm; Tp=24; T=96; Dp = 144mm; DG = 576 mm]

Answer 2

Question

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

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Answer 3

Question

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 5

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

Answer 6

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

Answer 7

Chapter 5.11, Problem 50P

(a)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

Answer 8

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

Answer 9

(b)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

Answer 10

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

Answer 11

(c)

To determine

The claim of the inventor on the refrigerator’s coefficient of performance, β=4.

Answer 12

Expert Solution & Answer

Answer 13

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Answer 14

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Answer 15

Ch. 5.11 - Prob. 1E Ch. 5.11 - 2. Are health risks associated with consuming...Ch. 5.11 - Prob. 3E Ch. 5.11 - Prob. 4E Ch. 5.11 - Prob. 5E Ch. 5.11 - 6. Does the second law impose performance limits...Ch. 5.11 - Prob. 7E Ch. 5.11 - 8. What is delaying the appearance in new car...Ch. 5.11 - Prob. 9E Ch. 5.11 - 10. How significant is the roughness at a pipe’s...

The claim of the inventor on the refrigerator’s coefficient of performance, β = 10 .

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The claim of the inventor on the refrigerator’s coefficient of performance, β=10.

The claim of the inventor on the refrigerator’s coefficient of performance, β=9.6.

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