Stainless steel ball bearings having a diameter of 1.5 inches are to be quenched in water at a rate of 750 per minute. the balls leave the oven at a uniform temperature of 950°c and are exposed to air at 25°c for a while before they are dropped into the water. if the temperature of the balls drops to 875°c prior to quenching, determine the rate of heat transfer from the balls to the air.

Q=6318kJ

Explanation:

First, wirte all units in the international system:

Now, check on a book to find density and specific heat of stainless steel:

You can calculate the mass of the balls as:

To know the heat transfer per ball:

And finally to calculate the total heat transfer just multiply by the rate of balls being quenched:

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

overcharge is the right answer system