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The heating element of an electric oven is designed to produce 3.0 kW of heat when connected to a 240-V source. What must be the resistance of the element? Express your answer to two significant figures and include the appropriate units. An electric car uses a 45- kW motor. If the battery pack is designed for 340 V, what current would the motor need to draw from the battery? Neglect any energy losses in getting energy from the battery to the motor. Express your answer to two significant figures and include the appropriate units. At $0.095/kWh, what does it cost to leave a 23 W porch light on day and night for a year? Express your answer using two significant figures. An ac voltage, whose peak value is 200 V, is across a 380- resistor. What is the peak current in the resistor? Express your answer to two significant figures and include the appropriate units. What is the rms current in the resistor? Express your answer using two significant figures. The peak value of an alternating current in a 1700-W device is 4.6 A. What is the rms voltage across it? Express your answer to two significant figures and include the appropriate units.