Register
Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 380 K in an air environment for which [infinity] 325 K and 20 W/m2·K. Assuming the properties of the steel to
140k views
5 votes
Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 380 K in an air environment for which [infinity] 325 K and 20 W/m2·K. Assuming the properties of the steel to be 40 W/m·K, 7800 kg/m3, and 600 J/kg·K, estimate the time required for the cooling process.

User GuavaMantis
by
8.1k points

1 Answer

6 votes

Answer:

0.3117 hour required for the cooling process.

Step-by-step explanation:

See attached pictures.

Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling-example-1
Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling-example-2
User Roman Toasov
by
8.6k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

8.8m questions

11.4m answers

Other Questions

A piston-cylinder device fitted with stops in the cylinder walls contains 2.1 kg of water initially at 150 kPa and 30 °C. Heat is transferred to the system until the final temperature reaches 250 °C. The
A water towers lowest point is 405 ft and the main line is 6 feet below the ground. The ground elevation is at 276 ft. The main line travels 2.9 miles. The pipe will travel through the following flanged
The bulk modulus of a fluid if it undergoes a 1% change in volume when subjected to a pressure change of 10,000 psi is (a) 0.01 psi (b) 0.001 psi (c) 0.00001 psi (d) 0.000001 psi (e) none of these
A car has an initial speed of 10 m/s. It then undergoes a constant acceleration of 0.05 m/s^2 over a distance of 5 km. Determine: a) The car final speed. b) The time needed to travel the 5 km.
Where are all the controls on most circuits?
Link Copied!