The figure below depicts a 0-to-10 potentiometer as a variable load resistor connected to a circuit of an unknown architecture. When the wiper position on the potentiometer was adjusted such that , the current through it was measured to be 3 mA, and when the wiper was lowered so that , the current decreased to 2.5 mA. Determine the value of that would extract maximum power from the circuit.

Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg. k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m. k

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.