A Nichrome heater dissipates 526 W when the applied potential difference is 110 V and the wire temperature is 800oC. What would be the dissipation rate if the wire temperature were held at 200oC by immersing the wire in a bath of cooling oil? The applied potential difference remains the same, and α for Nichrome at 800oC is 4.0 × 10-4 K-1.

Working alone at its constant rate, pump x pumped out ¼ of the water in a tank in 2 hours. then pumps y and z started working and the three pumps, working simultaneously at their respective constant rates, pumped out the rest of the water in 3 hours. if pump y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water, how many hours would it have taken pump z, working alone at its constant rate, to pump out all of the water that was pumped out of the tank? a) 6b) 12c) 15d) 18e) 24