Question: PROBLEM # 4 420pts] Consider a 4cm diameter spherical steel ball (k=50W/(mK)) which is cooling by convection in air at 25C with h=5000W/(m2K). The initial

$PROBLEM \# 4 420pts] Consider a 4cm diameter spherical steel ball$

PROBLEM \# 4 420pts] Consider a 4cm diameter spherical steel ball (k=50W/(mK)) which is cooling by convection in air at 25C with h=5000W/(m2K). The initial temperature is 800K. The thermal diffusivity of the ball is =18106m2/s (a) Using a lumped capacitance analysis, calculate the temperature at the centre of the ball after 1 second. (b) Using a lumped capacitance analysis, calculate the fraction of the energy removed after 50 seconds. (Note: Relative to 25C reference.) (c) Is the lumped capacitance method valid? Justify your answer. (d) Repeat part a) using the first term spatial solution

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

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

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Chemical Engineering Questions!

thanks PROBLEM \# 4[ 20pts] Consider a 4cm diameter spherical steel ball (k=50W/(mK)) which is cooling by convection in air at 25C with h=5000W/(m2K). The initial temperature is 800K. The thermal...

Let P be the polytope in 2 dimensions defined by the following 8 inequality constraints. (a) 3m1 + mg g 3, (b) $1 + 23:2 2 2, (G) 3:61 + 3:2 2 3, (d) 3331 + 2.782 g 6, (e) 0 3 1:1 3 5, (f) 0 g 932 S...

Pick any call option from problem 4, and consider delta and gamma hedging a short position on this call, using the underlying stock and a put with the same and as the call. Calculate the investment...

Problem 4 1) Consider the vowel training data, which has 11 classes with XR1n. Follow the procedure on page 114 to find the first and second discriminant variables (also called canonical...

Cconsider the following financial statements for Green Valley Nursing home, Inc., a for profit long term care facility AutoSave Off Chapter13ProblemsUHFM7thEdition (1) - Excel File Home Insert Page...

MAA Logged in as DPATE217@depaul,edu. MATHEMATICAL ASSOCIATION OF AMERICA Log Out + WeBWork MAIN MENU Logged in u DPATE2170depau.u. Loq Out (4 WeBWorK MAIN MENU Homewcyk Sets 4, 1 Fa112020 6 User...

help tutors plz 14.01 Fall 2010 Problem Set 6 1. (10 points) In Cambridge, shoppers can buy apples from two sources: a local orchard, and a store that ships apples from out of state. The orchard can...

Problem 1 [201113) Cardi 0 went to a. party and drank alcohol. She estimated that her blood alcohol content {BAG} was [1.16. BAC decreases by 25% every hour. a. [8 pts} Is this situation describing a...

Problem 3 Consider the following deterministic optimization problem: Minimise q , f ( x 1 , x 2 ) = 0 . 2 5 x 1 2 + x 2 2 Subject to: ( x 1 , x 2 ) = 5 - x 1 - x 2 = 0 g ( x 1 , x 2 ) - = x 1 + 0 . 2...

This business of people saying they thrive on stress its nuts, says one eminent psychiatrist who goes so far as to say that such people are in danger of slipping into a pathological state....

The price of products may increase due to inflation and decrease due to depreciation. Derek is studying the change in the price of two products, A and B, over time. The price f(x), in dollars, of...

Which of the following statements is true regarding the cut - off of purchases? Acceptable detection risk is likely to be high. Most entities have effective controls to ensure proper cut - off. It...

5. Develop a scenario comparing two PH programs and involving the use of a CBA.

Why is the direct plan acceptable for notifying job applicants that they were not selected for a position? (Objectives 5 and 6)

You are the franchised dealer for Starlight satellite TV. Last week you ran a four-room installation special in the local newspaper that offered free installation, one-month free service, and a free...

Teamwork.Ethics.Working with three classmates with two on each side of the issue, debate the ethics of using the indirect or the direct plan for negative messages. (Objectives 3, 4, 5, and 6)