How much energy is consumed by a 1.1 kW hair dryer used for 12 min? Express your answer with the appropriate units. HẢ E = Value Units Submit Request Answer Part B How much energy is consumed by a 12 W night light left on for 10 hr? Express your answer with the appropriate units. HẢ ? E = Value Units

Part A How many kWh of energy does a 650-W toaster use in the morning if it is in operation for a total of 5.5 min ? Express your answer to two significant figures and include the appropriate units. Energy = 6.0x10-2 kWh Submit Previous Answers Correct Part B At a cost of 9.0 cents/kWh, estimate how much this would add to your monthly electric energy bill if you made toast four mornings per week (16 times per month). Express your answer using two significant figures. ? Cost = cents/month

Part A A 5.1x10 V/m electric field creates a 3.5x1017 electrons/s current in a 2.0-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. m/s = Pa Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the mean time between collisions for electrons in this wire? Express your answer using two significant figures.

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Apply the loop rule to loop abcdefghija in the figure below. Use the following as necessary: E,, E2, E3, Ea, I, I3, R1, R2. 1, r2, a and rs For loop abcdefghija, = 0 ww S. ww ww ww

A student calculates the total potential difference of a circuit given the total current and total resistance for the circuit. The student works a new version of the question where the power has been changed by a factor of 0.693. Determine the factor by which the answer would change. 0.693 It does not change or it does not make sense to calculate given this information. 0.480 1.443

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Part A A 1.3x10-3 V/m electric field creates a 4.9x1017 electrons/s current in a 1.5-mm-diameter aluminum wire. What is the drift speed? Express your answer using two significant figures. va = 1.12 • 10-6 m/s Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B What is the mean time between collisions for electrons in this wire? Express your answer using two significant figures. nνα ΑΣφ ? T = S Submit Request Answer Drovide Cood bools

The wiring in a house must be thick enough so it does not become so hot as to start a fire. Part A What diameter must a copper wire be if it is to carry a maximum current of 40 A and produce no more than 1.4 W of heat per meter of length? Express your answer using two significant figures. ? d = m