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:

resonant frequency

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.