n electric heater had a power rating of 1.5 kilowatts if the heater is run for 6 hours and electricity costs $0.12 per kilowatt hour, how much will it cost to run the heater for this time interv

Q: A standard flashlight battery can deliver about 4.9 W·h of energy before it runs down. (a) If a…

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Q: Can someone help me solve this problem? (a) How many Christmas tree lights drawing 5.00 W of power…

A: (a) The total power of the Christmas tree light is, The number of Christmas tree that can be…

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: If an iron takes 660KJ of energy from the mains supply after being left on for 10 minutes, what is…

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Q: In the circuit diagram R1 = 5R and R2 = 15R, where R = 24 Ω. The power dissipated in resistor 2 is P…

A: Current in the circuit P2=I2R2I=P2R2=3.7 W15×24 Ω=0.1013 A

Q: B. Calculate the cost of running a 75 W stereo for two days if the cost per hour is 70 centavos.

A: The total cost to run a device in a certain time is C = c×t, where C = total cost c = cost per hour…

Q: 1. You use a 1300-watt hair dryer for 10 minutes each day. (a) What is the power of the hair dryer…

A: Given data P=1300 Wt=10 min

Q: In a particular city, electrical energy costs $0.13 per kilowatt-hour. (Round your answers, in…

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Q: A microwave oven has a power requirement of 1,248 W. A frozen dinner requires 5.0 min to heat on…

A: Given: The power required to microwave is 1248 W. The time required to heat the frozen dinner is 5.0…

Q: C. A 5.5-kW water heater operates at 240 V. i. Should the heater circuit have a 20A or a 30A circuit…

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Q: How much energy is consumed by a 1.0 kW hair dryer used for 11 min?  E= How much energy is…

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Q: (a) What is the hot resistance of a 25-W light bulb that runs on 120-V AC?    (b) If the bulb’s…

A: The hot resistance of the bulb can be obtained as

Q: n a household, a 197-W PC is run for 4 hours/day, while a 74-W bulb runs for 8 hours/day. If the…

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Q: Consider that a heart of defibrillator uses 404 j of energy in 11 ms What is the average power…

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Q: A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 1500 W…

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Q: An average-sized home refrigeration unit has a 1/19−hp fan motor for blowing air over the inside…

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Q: How many kW of energy does a 650-W toaster use in the morning if it is in operation for a total of…

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Q: A typical cost for electric power is $ 0.135 per kilowatt-hour. (a) Some people leave their porch…

A: Solution

Q: How much kWh of energy does a 550-W toaster use in the morning if it is in operation for a total of…

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Q: n the United States the standard voltage in homes is 120 V. Therefore, a "60 W* American bulb would…

A: We know that power as  P=VI Using Ohm's law V=IR We have power as  P=VI=I2R=V2R Using the above…

Q: A 1450 W radiant heater is constructed to operate at 115 V. (a) What is the current in the heater…

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Q: A coffee pot heat water with an electrical heater. The coffee pot is plugged into 120v wall socket…

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Q: a) A battery having an emf (ɛ) of 6V and an internal resistance (r) of 0.30 is connected to a load…

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Q: Given R1 = 11 Ω, R2 = 21 Ω, R3 = 33 Ω, and ℰ = 14 V. a) What is the power dissipated in R2, in…

A: the solution is

Q: A hoist is used to lift 10 tons of load @ a height of 12 meters in one minute. (a) What is the power…

A: The required mass to be lifted is 10 tons. 10 tons=10000 kg. This mass is to be lifted 12 meters in…

Q: (a) How much power is dissipated in a short circuit of 240-V ac through a resistance of 0.250 Ω ?…

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Q: A standard flashlight battery can deliver about 2.0 Wh of energy before it runs down. (a) If a…

A: a) The cost of operating a 100W lamp for 8 hrs using batteries if a battery coast US$0.80,

Q: a) In the figure what value must R have if the current in the circuit is to be 1.1 mA? Take ε1 = 1.5…

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Q: In a particular town, electrical energy costs $0.12 per kilowatt-hour. (Round your answers, in…

A: Given the town cost 0.12 dollars per kilowatt-hour. Let P defines as the power. And t be defined as…

Q: A family of five is planning to install solar panels on the roof of their home to help reduce the…

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Q: A microwave oven has a power requirement of 1,243 W. A frozen dinner requires 6.5 min to heat on…

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Q: D. and kept on for 50 min. The amount of energy transferred to the room by the heater is A 2-kW…

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Q: A clothes dryer uses 3,000 watts when the motor is running. A newer model uses 400 watts when the…

A: Given The power of the old cloth dryer is Po=3000 W=3000×10-3 =3 kW. The power of the new model of…

Q: Consider a power supply with fixed emf ε and internal resistance r causing current in a load…

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts (a, b,…

Q: 13. An energy-efficient fluorescent lightbulb operating at power P1 = 28 W can produce the same…

A: Given data: Energy-efficient fluorescent lightbulb operating power, P1=28 W Conventional…

Q: The power supplied to a typical black-and-white television set is 90 W when the set is connected to…

A: Given data:  Power (P) = 90 W Voltage (V) = 120 V Time (t) = 1 hour Required: Energy consumed (E)

Q: A water jet consumes 3750 W for 126 hours a week. a. What is the energy consumed (kWh) for a…

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Q: An 1110 W radiant heater is constructed to operate at 220 V. (a) What will be the current in the…

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Q: A typical bulb in your residence is rated 100W which means that the bulb dissipates 100W when…

A: Given: Power, P=100 W Voltage , V=110 V   To determine: (a) The current. (b)  The dissipated power…

Q: In the figure what value must R have if the current in the circuit is to be 1.1 mA? Take ε1 = 3.0 V,…

A: Current in the circuit (I) = 0.0011 Apotential of first battery (E1) = 3 V potential of second…

Q: (a) If the cost of electricity in your area is 12 cents per kWh, what is the total cost (capital…

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Q: (a) In the figure what value must R have if the current in the circuit is to be 0.84 mA? Take ε1 =…

A: (a)   Apply the loop’s rule in the given circuit by taking anti-clockwise from the lower right…

Q: (a) In the figure what value must R have if the current in the circuit is to be 1.0 mA? Take ₁ = 2.2…

A: Given data:  Current (I) = 1.0 mA = 1.0×10-3 A ε1 = 2.2 V and ε2 = 3.2 V r1 = r2 = 3.3 Ω Required:…

Q: A person used his 1500 W air-conditioning unit for 6 h every day during the month of July. a. How…

A: Given data: Power (P) = 1500 W = 1.5 kW Daily uses = 6 h, during July month  Cost of electricity =…

Q: In 2019, residential customers in the United States purchased an average of 10,649 kilowatt-hours of…

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Q: A 1⁄2 hp motor draws a current of 4.0 A from a 120-V line. (a) Calculate the electric power used by…

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