A plane wall with surface temperature of 350°C is attached with straight rectangular fins (k = 235 W/m·K). The fins are exposed to an ambient air condition of 25°C and the convection heat transfer coefficient is 154 W/m2·K. Each fin has a length of 82 mm, a base of 5 mm thick and a width of 100 mm.

Determine the efficiency, heat transfer rate, and effectiveness of each fin.

The efficiency of fin is 64.2%,

heat transfer rate 543.03W and

effectiveness of each fin is 21.67.

Explanation:

See the explanation in the attached files.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete