Question: A household refrigerator that has a power input of 450 W and a COP of 2.5 is to cool five large watermelons, 10 kg each,

A household refrigerator that has a power input of 450 W and a COP of 2.5 is to cool five large watermelons, 10 kg each, to 8°C. If the watermelons are initially at 20°C, determine how long it will take for the refrigerator to cool them. The watermelons can be treated as water whose specific heat is 4.2 kJ/kg • °C. Is your answer realistic or optimistic? Explain.

Step by Step Solution

★★★★★

3.34 Rating (166 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

The COP and the power consumption of a refrigerator are given The time it will take to cool 5 waterm... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

E-ME-T (1832).docx

120 KBs Word File

Students Have Also Explored These Related Mechanical Engineering Questions!

Reconsider Prob. 1226. Determine how long it will take to empty the swimming pool completely. In Problem The water in an 8-m-diameter, 3-m-high above-ground swimming pool is to be emptied by...

Consider a household refrigerator that has just been filled up with room-temperature food. Define a control volume (mass) and examine its boundaries for rates of work and heat transfer, including...

Lets figure out how long it will take for the average Indian to be as wealthy as the average Western European is today. All numbers are adjusting for inflation, so were measuring output in piles of...

Problem 7 A household refrigerator that has a power input of 5 0 0 W and a COP of 1 . 4 is to cool 4 large watermelons, 1 2 k g each, to 7 C . If the watermelons are initially at 3 0 C , determine...

1. A closed system containing 5-kg of air undergoes an isothermal process from 400 kPa and 300 C to 80 Kpa. Determine the initial volume of this system, the work done and the heat transfer during...

# 9 4 4 . Calculating Time to Cool Object Given Power Input A household refrigerator that has a power input of 4 4 6 W and a COP of 1 . 5 is to cool 5 watermelons, 1 0 kg each, to 1 0 C . The...

Is there a good rationale for raising $30 to $60 million at the time of the case? What do you estimate the companys value (total and per share) to be as of March 2007? This does not mean looking back...

6 - 4 9 A household refrigerator that has a power input of 4 5 0 W and a COP of 1 . 5 is to cool 5 large watermelons, 1 0 kg each, to 8 C . If the watermelons are initially at 2 8 C , determine how...

Q.1) 5 Kg of R-134a fill a 1.5 m3 rigid container at an initial temperature of -60 deg.C. The container is then heated until the pressure is 200Kpa. Determine the final temperature and the initial...

Consider a Carnot cycle executed in a closed system with air as the working fluid. The maximum pressure in the cycle is 1300kPa while the maximum temperature is 950K. If the entropy increase during...

Evaluate the integral 43 cos xdx, using C as the constant of integration.

Tim O'Hare is the distribution manager for Consolidated, Inc. Major builders can order from Consolidated, Inc. two products: door hardware and casters. Since the construction industry goes through...

A recliner chair that sells for $ 1 comma 5 1 6 1 , 5 1 6 is marked up 5 5 5 5 % of the selling price. a . What is the markup? b . What is the cost ?

Married people have a lower mortality rate than do unmarried people at all ages. Select one: O a. True O b. False

on 29 A gerontology nurse is a nursing specialist who works directly with et older adults to provide them with: red d out of Select one: O a. Quantity of years e question O b. High quality of life...

Fon 20 The rate of aging among different body systems within one et individual may vary, with one system showing marked decline while ered another demonstrates no significant change. ed out of Select...

ion 3 The primary source of health insurance for older adults is Medicare. et Medicaid provides: ered ed out of Select one: O a. Supplemental insurance for individuals with High incomes. O b....

on 7 Minimizing stress when possible and using effective stress et red management techniques are useful interventions. d out of Select one: O a. True O b. False

Revise the following sentences to reduce gender, racial, ethnic, age, and disability bias. Each nurse is responsible for her patients medications.

7. If your client decides to invest 65% of their money into ORP and 35% into Rf security, what would be the expected return of that combination (Rf = 0.1%)? a. 2.70% b. 2.56% c. 1.79% d. 1.76% e....

Business QUESTION 31 Lucky accountants, the International Accounting Standards are identical to the us. Generally Accepted Accounting Principles (GAAP) for U.S. True False 4 points QUESTION 32 Which...

1. make sure the answer is in 2 decimals. Read question carefully 2. Make sure the final answer is in 2 decimals. Please read the question carefully 3. Find the future value of a five-year $97,000...