Chapter 43, Problem 65GP

Two very long wires carry current along y-axis. First is at x=0 0.45 amps current is upward. Second at x=5 currentwith 0.65 amps current downward. Find the net magnetic a) Two meters to the left of the first wire. b) Twometers to the right of the first wire. a) Two meters to the right of the second wire. b) Two meters to the right ofthe second wire.

! Required information The PV diagram shown is for a heat engine that uses 1.030 mol of a diatomic ideal gas as its working substance. In the constant-temperature processes A and C, the gas is in contact with reservoirs at temperatures 373 K and 273 K, respectively. In constant-volume process B, the gas temperature decreases as heat flows into the cold reservoir. In constant- volume process D, the gas temperature increases as heat flows from the hot reservoir. Pressure (kPa) 160 150 A 140 D 373 K 130 120 110 100 273 K C 90 80 B 0.019 0.02 0.021 0.022 0.023 0.024 0.025 0.026 Volume (m³) To compare the efficiency of the heat engine to that of an ideal engine, what is the ratio of the efficiency of an ideal engine using the same reservoirs to that of the heat engine, if the heat input per cycle is 2854 J?

4 1.00 mol of oxygen gas (O2) is heated at a constant pressure of 1.00 atm from 10.0°C to 25.0°C. How much heat is absorbed by the gas? Multiple Choice О 389 J о 544 J О 436 J О 288 J