Which of the following best describes what happens when ice is placed in a warm glass of water?
a. the ice floats to the top, but small pieces break off and are suspended in the liquid to cool it through convection
b. heat from the glass moves through the liquid to melt the ice through radiation
c. the heat from the surrounding liquid is transferred to the ice through conduction
d. the ice transfers the cold temperature to the surrounding water through convection

Ajournal bearing has a journal diameter of 3.250 in with a unilateral tolerance of 20.003 in. the bushing bore has a diameter of 3.256 in and a unilateral tolerance of 0.004 in. the bushing is 2.8 in long and supports a 700-lbf load. the journal speed is 900 rev/min. find the minimum oil film thickness and the maximum film pressure for both sae 20 and sae 20w-30 lubricants, for the tightest assembly if the operating film temperature is 160°f. a computer code is appropriate for solving this problem.

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.

What are the major differences between injection molding and extrusion?