Technician "A" states that in a disc brake system the brake caliper clamps the two brake pads against the brake rotor to slow the vehicle. Techician "B" states that in a
drum brake system the wheel cylinder pushes out against the two brake shoes that in
turn press against the inside of the brake drums to slow the vehicle. Who is correct?
-Tech A only
-Neither tech is correct.
-Both techs are correct
-Tech B only

Air at a pressure of 1atm and a temperature of 40 c is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 120 c. the plate has a length of 0.40m (in the flow direction) and a width of 0.15m. the reynolds number based on the plate length is 50, 000. what is the rate of heat transfer from the plate to the air? if the free stream velocity of the air is doubled and the pressure is increased to 10 atm what is the rate of heat transfer?