If electrical energy costs $0.12 per kilowatt-hour, how much do the following events cost? (a) To burn a 120-W lightbulb for 24 h. $ (b) To operate an electric oven for 6.6 h if it carries a current of 20.0 A at 220 V. $

Q: A 660 W electric heater is designed to operate from a 120 V source. If the source voltage drops to…

A: Given data: The power of heater is P1=660 W. The voltage of heater is V1=120 V. The drop in voltage…

Q: A 2 kg toy car can drive at a constant speed of 20 km/hr, please: a. Calculate the kinetic energy at…

A: Given value--- Mass = 2 kg . speed = 20 km/h. We have to find--- kinetic energy? if voltage = 12…

Q: Calculate the rate of the flashlight’s energy consumption. Suppose a flashlight has 6.8 × 102 C…

A: Given data:  Charge (q) = 6.8×102 C Time (t) = 0.35 h Voltage (V) = 3.00 V Required: Power (P)

Q: An electric heater is constructed by applying a potential difference of 158.4V across a wire with a…

A: Potential difference = V = 158.4 V Resistance = R = 5 ohm Power will be given by following formula:…

Q: Part A How many 75-W lightbulbs, connected to 120 V as in the figure, can be used without blowing a…

A:

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A: Given Information:- Potential difference across a human neuron in the human body is  V=62…

Q: Problem 13: Suppose you have have a 1500 W toaster. Part (a) How much electrical energy in J is…

A: power of toaster   p=1500W ie,  1500 J energy is consumed in one second    P=E/t   now time  t=1…

Q: How many 75-W lightbulbs, connected to 120 V as in the figure, can be used without blowing a 12 A…

A: Given The power of the one bulb is P1=75 W. The voltage supply to the circuit is V=120 V. The…

Q: Lightbulb A is marked “25.0 W  120. V,” and lightbulb B ismarked “100. W 120. V.” These labels mean…

A: Here,

Q: (a) A well-insulated electric water heater warms 127 kg of water from 20.0°C to 45.0°C in 23.0 min.…

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Q: The heating element of a coffee maker operates at 120 V and carries a current of 3.50 A. How long…

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Q: Question #18. Calculate the cost of operating this light bulb in 10 seconds. Given 4pesos/kWhr. I…

A: Given: The power of the bulb is 50 W. The time interval is 10 s. The cost rate is 4 pesos/kWhr.

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A: Let the time in which battery discharges completely be t. the power consumed by the bulb of power P…

Q: 2. &=3.00 V, &= 1.00 V, R₁ = 4.00 £2, R2 = 2.00 2, R3 = 5.00 £2, and both batteries are ideal. What…

A: The objective of the question is to find the rate at which energy is dissipated in resistors R1, R2,…

Q: The 400 V battery of a Tesla Model S electric car stores 3.0 X 108 J of energy. At 65 mph, the car…

A: Time taken to drive 250 Miles at 65 Mph speed is  t= 25065 hr= 3.84 hr =1.38 x 104 s The Power…

Q: A light bulb is rated at 30 W when operated at 120 V. How much charge enters (and leaves) the light…

A: Given data: Power P =30 W Voltage V=120 V Time t =1.5 min =90 seconds

Q: A 660 W electric heater is designed to operate from a 120 V source. If the source voltage drops to…

A: We know power of the any device is given by          P   = V²/R  Where v = voltage  across the…

Q: You are given a number of 16 Ω resistors, each capable of dissipating only 2.0 W without being…

A: In this question we are given with a number of 16 Ω resistors, each capable of dissipating only 2.0…

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Q: The Iceberg Kid, infamous for imposing a deep freeze on whoever disagrees with him, discovers that…

A: Given., Thermal energy is generated W = 177 J For time  t = 7.69 Voltage V = 12 V    We know the…

Q: a) A well-insulated electric water heater warms 127 kg of water from 20.0°C to 45.0°C in 23.0 min.…

A:

Q: An electric car is designed to run off a bank of 12.0 V batteries with a total energy storage of…

A: Given Information: The power is P=7200 W The total storage energy is E=2.30×107 J The batteries…

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Q: A 120 V potential difference is applied to a space heater whose resistance is 13.7 Ω when hot. At…

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Q: A lamp (R₁ = 151 2), an electric heater (R₂ = 27 2), and a fan (R3 = 51 (2) are connected in…

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Q: Some makes of older cars have 6.00 V electrical systems. (a) What is the hot resistance (in 0) of a…

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Q: The hot dog cooker described in the chapter heats hot dogs by connecting them to 120 V household…

A: Given: The mass of hot dog is m=60 g. The voltage connected to household electricity is V=120 V.…

Q: A heater is being designed that uses a coil of 14-gauge nichrome wire to generate 300 W using a…

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Q: A car battery causes a current of 3.75 A through a car head-lamp and produces 12 V across it.  What…

A: Given data:  Current (I) = 3.75 A Voltage (V) = 12 V Required: Power (P)