Question

A boy decides to place his glass marbles in an oven at 200°C. The diameter of the marbles is 15 mm. After a while he takes them from the oven and places them in room air at 20°C to cool. The convection heat-transfer coefficient is approximately 14 W/m 2 -°C. Calculate the time boy must wait until the temperature at r = 1 mm of the marbles reaches 50°C.

Answer 1

Explanation:

Mouse Keys. Updated: 11/13/2018 by Computer Hope. Microsoft Windows accessibility feature that allows a user to control their mouse movement using the numeric pad on their keyboard.