**1. **A 0.15-m-diameter pulley turns a belt rotating the driveshaft of a power plant pump. The torque applied by the belt on the pulley is 200 N ? m, and the power transmitted is 7 kW. Determine the net force applied by the belt on the pulley, in kN, and the rotational speed of the driveshaft, in RPM.

**2. **A 10-V battery supplies a constant current of 0.5 amp to a resistance for 30 min. (a) Determine the resistance, in ohms. (b) For the battery, determine the amount of energy transfer by work, in kJ.

**3. **Carbon monoxide gas (CO) contained within a piston- cylinder assembly undergoes three processes in series:

**Process 1-2: **Expansion from *p*1 5 5 bar, *V*1 5 0.2 m3 to *V*2 5 1 m3, during which the pressure-volume relationship is *pV *5 *constant*.

**Process 2-3: **Constant-volume heating from state 2 to state 3, where *p*3 5 5 bar.

**Process 3-1: **Constant-pressure compression to the initial state.

Sketch the processes in series on *p*-*V *coordinates and evaluate the work for each process, in kJ.

**4. **Air contained within a piston-cylinder assembly undergoes three processes in series:

**Process 1-2: **Compression at constant pressure from *p*1 5 10 lbf/in.2, *V*1 5 4 ft3 to state 2.

**Process 2-3: **Constant-volume heating to state 3, where *p*3 5 50 bf/in.2

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Determine the resistance : A 10-V battery supplies a constant current of 0.5 amp to a resistance for 30 min. (a) Determine the resistance, in ohms. (b) For the battery, determine the amount of energy transfer by work, in kJ. |

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