A sphere of 25-mm diameter contains an embedded electrical heater. Calculate the power required to maintain the

Question:

A sphere of 25-mm diameter contains an embedded electrical heater. Calculate the power required to maintain the surface temperature at 94°C when the sphere is exposed to a quiescent medium at 20°C for:

(a) Air at atmospheric pressure,

(b) Water, and

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

See More Books

Question Posted: Oct 01, 2010 01:31 AM

See More Questions

a steel rod of 25 mm diameter is fitted inside a brass tube of 25 mm internal diameter and 375 mm external diameter. the projecting ends of the steel rod are provided with nuts and washers. the nuts...
An aqueous solution of antifreeze contains 6.067 M ethylene glycol (HOCH2CH2OH, FM 62.07) and has a density of 1.046 g/mL. (a) Find the mass of 1.000 L of this solution and the number of grams of...
A sphere 20 cm in diameter containing liquid air (??140?C) is covered with 5 cm thick glass wool (50 kg/m3 density) with an emissivity of 0.8. Estimate the rate of heat transfer to the liquid air...
Find the nth, or general, term. a. 1, 3, 9,...... b. 25, 5, 1,....... c. 1, -1, 1, -1, .....
For 2013, the income statement of Hylard Corporation had revenues of $152,000 and operating expenses of $78,000. Accounts receivable and accounts payable at year-end were $60,000 and $23,000,...
During 2001, Xeroxrestated its prior year earnings. The original earnings for the years 19972000 had been overstated by approximately $3 billion before-tax. According to Securities and Exchange...
Use the following information from the records of Packen Partners to prepare an income statement under the periodic inventory system for the year ended 30 June 2026. Purchases Inventory, 1 July 2025...
Draw the network representation of the following network flow problem. MIN: +7X12 + 6X14 + 3X23 + 4X24 + 5X32 + 9X43 + 8X52 + 5X54 Subject to: - X12 - X14= -5 +X12 + X52 + X32 - X23 - X24 = +4 - X32...
a) Risk analysis is the study of the underlying uncertainty of a given course of action and refers to the uncertainty of forecasted cash flow streams, the variance of portfolio or stock returns, the...
1. Table of cross-classified counts 2. Counts cases that match values of two categorical variables 3. Shown in the bar chart of a categorical variable 4. Shown in a stacked bar chart 5. Measure of...
Consider a 2-mm-diameter sphere immersed in a fluid at 300 K and 1 atm. (a) If the fluid around the sphere is quiescent and extensive, show that the conduction limit of heat transfer from the sphere...
Under steady-state operation the surface temperature of a small 20-W incandescent light bulb is 125C when the temperature of the room air and walls is 25C. Approximating the bulb as a sphere 40 mm in...
a. Expand and simplify (4 + 3)(4 3) . b. Express 26/4 + 3 in the form a + b3, where a and b are integers.
Which is considered an indirect gift by an employee to a trust? A. Contributions to an adoption assistance program. B. Irrevocable assignment of group term life insurance. C. The revocation of a...
Dr. Dante DeMarco, dermatologist, wants to provide fringe benefits to his staff. Which fringe benefits can be provided income-tax free to his employees? I. 50 percent off on microdermabrasion. II....
Based on the history review of the mortgage market presented at the beginning of the chapter, can we say that the originate-to-distribute model is a recent business model?
A self-assessed risk-averse client wants to accumulate wealth. Of the following, which is the most critical action the personal financial planner should accomplish to assist the client in the...
Who qualifies for a dependent care assistance plan? I. A dependent child who was under the age of 18 when the care was provided. II. A dependent who is mentally or physically challenged. III. A...
Are the initial rates lower on a fixed-rate loan or a variable-rate loan? Why?
Find the reduced echelon form of each of the matrices given in Problems 120. c 1 26 + 4
With respect to a pump, what is net positive suction head?
A mass flow rate into a control volume requires a normal velocity component. Why?
A temperature difference drives a heat transfer. Does a similar concept apply to m.
Can a steady state device have boundary work?
For this assignment, submit the code (SQL script or document), including structure from the Data Definition Language (DDL) and the Data Manipulation Language (DML). Use these SQL Statements as a...
Data Manipulation Tasks a Insert 20 records into each table for testing purposes. a Delete an entire order by using the unique identifier for that order. o Update the price of a product by using the...
Data manipulation language (DML) provides a number of capabilities that allow you to build custom queries of existing data. What are two capabilities you might use to limit the data you select or...

A sphere of 25-mm diameter contains an embedded electrical heater. Calculate the power required to maintain the

Question:

Step by Step Answer:

KNOWN Sphere with embedded electrical heater is maintained at a uniform surface temperature when sus...View the full answer

Fundamentals of Heat and Mass Transfer

Students also viewed these Mechanical Engineering questions