Acircular fin (diameter of 3.5mm and length of 7cm) made of aluminum (2024-t6) connects two walls. the first wall is at a temperature of 125c and the second was is at a temperature of 40c the gap between the walls has flowing air at 25c with an effective convection coefficient of 65 w/m2k how much heat leaves the warm wall through the fin? upto 10pt bonus: how much heat enters the cold wall through the fin?

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

What happens when a rubber rod is rubbed with a piece of fur?

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?