Calculate the critical radius and the number of stable

Assignment Help Mechanical Engineering

Reference no: EM13948246

1. (a) Assume for the solidification of nickel (Problem 10.4) that nucleation is homogeneous, and the number of stable nuclei is 106 nuclei per cubic meter. Calculate the critical radius and the number of stable nuclei that exist at the following degrees of super- cooling: 200 K and 300 K.

(b) What is significant about the magnitudes of these critical radii and the numbers of sta- ble nuclei?

2. For some transformation having kinetics that obey the Avrami equation (Equation 10.17), the parameter n is known to have a value of 1.5. If, after 125 s, the reaction is 25% com- plete, how long (total time) will it take the transformation to go to 90% completion?

Reference no: EM13948246

Questions Cloud

Driving force for the formation of spheroidite : 1. Briefly cite the differences between pearlite, bainite, and spheroidite relative to micro structure and mechanical properties. 2. What is the driving force for the formation of spheroidite?

Costing system in the world in manufacturing firms : Why do you think standard costing is the most widely used costing system in the world in manufacturing firms, even though more sophisticated systems might be available? Discuss.

Transform the 2 relations into domain/key normal form : Transform the following 2 relations into Domain/Key Normal Form (DK/NF). Make and state the appropriate assumptions about functional dependencies and domains.

Should the company keep the old computer : Madison Company is considering replacing its existing mainframe computer with a new model manufactured by a different company. Compute NPV of each alternative. Should the company keep the old computer, or buy the new one?

Calculate the critical radius and the number of stable : 1. (a) Assume for the solidification of nickel (Problem 10.4) that nucleation is homogeneous, and the number of stable nuclei is 106 nuclei per cubic meter. Calculate the critical radius and the number of stable nuclei that exist at the followi..

What are the elements of capital in corporations : What are the elements of capital in corporations? What is the difference between a loan awarded to the company and the company issuing stock to shareholders? what would a debt/equity ratio tell you about a company?

How would this breech affect the valuation of the stock : When a company has a formal Ethics Policy and does something contrary to that policy, what impact might it have on the value of the stock, the employees, investors, regulators, and other stakeholders? How would this breech affect the valuation of the..

Approximate eutectoid temperature of alloy : A steel alloy is known to contain 93.65 wt% Fe, 6.0 wt% Mn, and 0.35 wt% C. (a) What is the approximate eutectoid temperature of this alloy? (b) What is the proeutectoid phase when this alloy is cooled to a temperature just below the eutectoid?

How do financial markets value securities : Once a common stock has been listed on the stock market, like the New York Stock Exchange, what causes the price of the stock to go up or down? Who benefits when the price goes up on a stock? Expound on as many factors as you can that will drive the ..

User Account

All Pages