Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling
Question:
Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air environment for which T∞, = 325 K and h = 20 W/m2 ∙ K. Assuming the properties of the steel to be k = 40 W/m ∙ K, p = 7800 kg/m3, and c = 600J/kg ∙ K, estimate the time required for the cooling process.
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 55% (9 reviews)
KNOWN Diameter and initial temperature of steel balls cooling in air FIND Time ...View the full answer
Answered By
Aqib Parvej
I am teaching since my graduation time so I have teaching experience of about 5 years and in these years I learn to teach in the best and interesting way .
4.80+
20+ Reviews
41+ Question Solved
Related Book For
Fundamentals of Heat and Mass Transfer
ISBN: 978-0471457282
6th Edition
Authors: Incropera, Dewitt, Bergman, Lavine
Question Posted:
Students also viewed these Mechanical Engineering questions
-
Often, the properties of multiphase alloys may be approximated by the relationship E (alloy) = EV + EV (9.24) where E represents a specific property (modulus of elasticity, hardness, etc.), and V is...
-
79Often, the properties of multiphase alloys may be approximated by the relationship E (alloy) = EV + EV (9.24) Where E represents a specific property (modulus of elasticity, hardness, etc.), and V...
-
Often, the properties of multiphase alloys may be approximated by the relationship where E represents a specific property (modulus of elasticity, hardness, etc.), and V is the volume fraction. The...
-
In Australia, the banking sector is dominated by four main institutions, the ANZ Banking Group, Commonwealth Bank, National Australia Bank, and Westpac. To maintain a competitive banking market, the...
-
Creative Learning Centers (CLC), a for-profit firm, operates over 100 preschools primarily located in the northeast for children ages 4-6. CLC's innovative curriculum utilizes the latest technology...
-
What two first-row transition metals have unexpected electron configurations? A statement in the text says that first-row transition metal ions do not have 4s electrons. Why not? Why do transition...
-
The maximum mechanical advantage is the reciprocal of PVs W slope. True or False
-
A satisfied customer is the most important goal of this company! was the opening remark of the corporate president, Alice Nunes, at the monthly executive committee meeting of Santiago Company. The...
-
Explain: Standard cost ideal standard vs practical standard Talk about Flexible budget+ (+ Variances actual) Do you will use ideal standard in the accounting computation? Target costing (pricing) +...
-
Ellipses Corp is a small business that operates in Herndon, VA. The company is located at10 Period Lane, Herndon, VA 20170. Its federal Employer Identification Number is 77-7777777, and its...
-
A plate of thickness 2L, surface area A s , mass M, and specific heat c p ' initially at a uniform temperature T , is suddenly heated on both surfaces by a convection process (T , h) for a period...
-
Consider the steel balls of Problem 5.5, except now the air temperature increases with time as T ,(t) = 325 K + at where a = 0.1875 K/s. (a) Sketch the ban temperature versus time for 0 < t < 1 h....
-
Halo Systems specializes in servers for work- group, e- commerce, and enterprise resource planning (ERP) applications. The companys original job cost system has two direct cost categories: direct...
-
What does the following recursive function return? public static String mystery (String s) { } int n = s.length(); if (n = 1) return s; String a s.substring(0, n/2); = String b s.substring(n/2, n);...
-
List three features of a balance sheet format which are particularly useful in making the format helpful to readers.
-
Add a toString() method to Vector that returns the vector components, separated by commas, and enclosed in matching parentheses.
-
Suppose you want to add a constructor to Comp1ex that takes a double value as its argument and creates a Comp1ex number with that value as the real part (and no imaginary part). You write the...
-
Implement the following additions to the Comp1ex API: Write a test client that exercises all of your methods. double theta () Complex minus (Complex b) Complex conjugate() Complex divides (Complex b)...
-
From the picture of Saturn in Figure P13.29 and known values, estimate the orbital period of particles in Saturn's rings. Data from Figure P13.29
-
One study found that the elderly who do not have children dissave at about the same rate as the elderly who do have children. What might this finding imply about the reason the elderly do not dissave...
-
Predict the Pxy behavior for a mixture of cyclohexane (1) + 1-butanol (2) at 383.15 K using the Peng-Robinson equation of state. Compare the predictions to the experimental data given in Table...
-
Use source exchange to find the current I0 in the network shown. 1 2 220 A 2 _j1
-
Use source transformation to determine I0 in the circuit shown. 2 1C2 12 0v -j1 420A
-
Use Thevenins theorem to find V0 in the circuit shown. j10 2 2 620A 1220V
-
I need to find out how to calculate the 3-year % rate of return. The information I have is a $10,000 investment and a 12-month yield percentage (1.138 for AB company, 1.894 for AIG company, 0.679 for...
-
Anna has an investment that will bring her $100 with a 30% probability and $40 with a 70% probability. Anna's Utility function is U = Y (1/2) . Where Y= income. Anna is considering selling this...
-
on January 1, 2000, the price of koka kola was $10. on jan and, 2020, the shares were worth $100. the stock Paid no dividends during the period. what is the annual geometric return.
Study smarter with the SolutionInn App