The ball bearing made of steel is to be heat treated. It is heated to a...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
The ball bearing made of steel is to be heat treated. It is heated to a temperature of 620C and then quenched in water that is at a temperature of 50C. The ball bearing has a diameter of 5 cm and the convective heat transfer coefficient between the bearing and water is 200W/m.K Determine: a) The length of time that the bearing must remain in water before the temperature at its center drops to 150C [Ans: 119.53s) b) The total heat removal from the bearing during the time interval [Ans:36.13 KJ The ball bearing made of steel is to be heat treated. It is heated to a temperature of 620C and then quenched in water that is at a temperature of 50C. The ball bearing has a diameter of 5 cm and the convective heat transfer coefficient between the bearing and water is 200W/m.K Determine: a) The length of time that the bearing must remain in water before the temperature at its center drops to 150C [Ans: 119.53s) b) The total heat removal from the bearing during the time interval [Ans:36.13 KJ
Expert Answer:
Answer rating: 100% (QA)
A classic heat transfer problem Step 1 Calculate the initial and final temperatures The initial temp... View the full answer
Posted Date:
Students also viewed these mechanical engineering questions
-
Suppose your firm is considering investing in a project with the cash flows shown below, that the required rate of return on projects of this risk class is 11 percent, and that the maximum allowable...
-
Wilt's currently has earnings per share of $2.98 and dividends per share of $0.35. The required rate of return for Wilt is 20%. a. What is the firm's sustainable rate of growth if its return on...
-
A steel billet is to be heat treated by immersion in a molten salt bath. The billet is 5 cm square and 1 m long. Prior to immersion in the bath, the billet is at a uniform temperature of 20C. The...
-
The fieldwork for the 30 June 20X0 audit of Tracy Brewing Company Ltd was finished on 19 August 20X0 and the completed financial statements, accompanied by the signed audit reports, were mailed on 6...
-
In a study of childhood asthma, 4,317 observations were collected on education and smoking during pregnancy, shown in the 4 3 contingency table below. Research question: At = .005, is smoking...
-
The speed of propagation C of a capillary wave in deep water is known to be a function only of density , wavelength , and surface tension Y. Find the proper functional relationship, completing it...
-
What are the assumptions underlying the flexible budget formula? Are these assumptions always valid when flexible budgets are used?
-
A researcher expects the population proportion of Cubs fans in Chicago to be 80 percent. The researcher wishes to have an error of less than 5 percent and to be 95 percent confident of an estimate to...
-
Courts will never be asked to examine the decisions of administrative bodies. True False
-
Choose the new media category. The new media is revolutionizing this generation we live in. I chose new media because it helps spread information and news virally and efficiently. Prompt Through the...
-
A New York City daily newspaper called Manhattan Today charges an annual subscription fee of $108. Customers prepay their subscriptions and receive 300 issues over the year. To attract more...
-
I believe a strong sense of self-worth will help you to overcome the fears and doubts that prevent you from succeeding in all aspects of life. Read the statement and briefly explain your thoughts on...
-
Look for a corpotate strategy such as vertical integration and diversification, differentiation, innovation, etc. that about Beauty company Glossier Inc., and describe the strategy and why it is...
-
A payment of $630 on an invoice for $1,077 reduced the balance owed to $433. What cash discount rate was allowed on the $630 payment?
-
Incident light of wavelength 1064 nm is Raman scattered in a glass with localized vibrational frequency fv = 20 THz. Determine the wavelength of the scattered light
-
solve this equation V = 400 gal, Co= 2.5, Qin gal 9.gal min
-
1A. If the researcher is concerned about the number of variables, the nature of the analysis, and completion rates, then, he/she is at which stage of the sampling design process (Figure 11.1 in the...
-
The Texon Co. is organized into autonomous divisions along regional market lines. Each division manager is responsible for sales, cost of operations, acquisition and financing of divisional assets...
-
A.R. Oma, Inc. manufactures a line of men's perfumes and after-shaving lotions. The manufacturing process is basically a series of mixing operations with the addition of certain aromatic and coloring...
-
Clarkson Company is a large multi-division firm with several plants in each division. A comprehensive budgeting system is used for planning operations and measuring performance. The annual budgeting...
Study smarter with the SolutionInn App