Q: How much electrical energy in a second is consumed by a bulb that ha a power rating of 50 watts?…
A: The power rating of a bulb is given by P=50 watts
Q: An electric heater is rated 1500 W. How much energy does it use in 10 hours?
A: Given : P = 1500 W = 1.5 kWh T = 10 hours
Q: An electric clothes dryer is rated at 4,000 W. How much energy does it use in 40 min?
A: Given that An electric clothes dryer is rated at 4,000 W So, power = p = 4000 w Also time = t = 40…
Q: An electric clothes dryer is rated at 5,400 W. How much energy does it use in 25 min? kWh
A:
Q: A typical candy bar contains approximately 250kcal. How long would this power a 60 W lightbulb?
A: Convert kilo calorie to joule. E=250 kcal4184 J1 kcal=1.046×106 J The relation between power and…
Q: How much does it cost to run a refrigerator all day for 6 months (30 days/month) if it requires 3.5…
A: Power is defined as the rate at which the work is done per unit of time. Higher power means having a…
Q: The cost to operate a clothes dryer for a year is $80.25. If the rate for electrical energy is…
A:
Q: How much energy is being used by a transmitting station drawing 40-A from a 440-V power line in 2…
A: Given : I = 40 A V = 440 V t = 2 hours = 2(60) = 120 seconds
Q: There are approximately 103 million TVs in the United States. Each uses, on average, 71 W of power…
A: Given: The number of TVs is 103 million. The average power used by each TV is 71 W. The number of…
Q: A microwave has a power requirement of 1,264 W. A frozen dinner required 4.2 mins to heat on full…
A:
Q: How much electric energy is delivered to a 60 W lightbulb if the bulb is left on for 2.5 hours?
A: Write the given values with the suitable variables. P=60 Wt=2.5 hr=2.5×3600 s=9000 s Here, P is the…
Q: How much power, in W, is flowing through a voltage source of 20 V with a current of 80 mA?
A: Given : Voltage (V) = 20 V Current (I) = 80 mA = 0.08 A
Q: if the current passes R1 is 25mA and the voltage at R2 is 25 V, what is the value of R2 ?
A:
Q: The resistance (in Ω) of a light bulb rated 120 W, 240 V that draws an electric current of 1 A is
A: Given Power rated is P=120 W Voltage rated is V= 240 V Find the resistance of a light bulb.
Q: How much will it cost to operate a 1500-W quartz heater for 48 h if the cost of electricity is…
A:
Q: An electric water heater consumes 7.13 kW for 3.85 h per day. What is the cost (in dollars per year)…
A: An electric water heater consumes 7.13 kW for 3.85 h per day. In a year, the heater consumes…
Q: A 1200W microwave oven transforms 1.8 x 10^5 J of energy while reheating some food. Calulate how…
A:
Q: An electric water heater consumes 5.63 kW for 2.85 h per day. What is the cost (in dollars per year)…
A: Given: The heater consumption of electricity is 5.63 kW for 2.85 h per day. The cost of electricity…
Q: At 15 cents is a kilo Watt per hour. What does it cost to operate 1200 W for 1 hour?
A: We have the given information: Power is P=1200 W Time is t=1 hr Calculating energy in kiloWatt per…
Q: An electric clothes dryer is rated at 2,600 W. How much energy does it use in 20 min? (Answer in…
A:
Q: Your family decides to limit TV watching to 17 hours every week. If the power rating on your TV is…
A: Given data: Number of hours uses in a week (t) = 17 h Power (P) = 394 W = 0.394 kW Electricity cost…
Q: What is the power rating of a television set which draws a current of 2 A from a 220-volt outlet?
A:
Q: If electricity costs 17.4 cents/kW-hr, how much will it cost to run the pump for 72 hours? (enter…
A: Given data : Total power used by the pump, P = 188 W Cost of…
Q: If your cell phone has a battery that can hold 1124 milliampere-hours of charge, how long will the…
A:
Q: A refrigerator using 1013 W runs one-fourth of the time. How much does the electricity cost to run…
A: Given,
Q: . An electric water heater requires 1100 W of power. Electricity costs 8 cents per kilowatt hour.…
A: Given Power of an electric heater = P = 1100 W = 1.1 kW Cost of electricity = 8 cents/kWh We have to…
Q: A person used his 1500 W air-conditioning unit for 5 h every day during the month of June. How much…
A:
Q: A lamp consumes 500 J of electrical energy in 20 sec. What is the power of the lamp?
A: Power of the lamp is calculated by the formula: Power = Energy consumed per unit time Power =…
Q: The previous reading in my meter is 36893 and the present reading is 36989 after a month. How much…
A: Meter reading is the amount of electrical energy consumed. The consumed electrical energy is…
Q: How much current is drawn by a 150 W television when it is plugged into a household outlet?
A:
Q: The electrical power, P (in watts), transformed by an electrical appliance is given by P = f(i) =…
A:
Q: An electric clothes dryer is rated at 3,400 W. How much energy does it use in 30 min?
A: power of electric cloth dryer (P) = 3400 W time (t) = 30 min
Q: The cost of electricity in Los Angeles is 5 cents per 1,000,000 joules. Suppose a small 2000-watt…
A: Given data: Cost of electricity = 5 cents per 1,000,000 J Power (P) = 2000 W Time (t) = 3 hours…
Q: What energy is produced by a 200 W light bulb lit for 2.7 hours? Answer in units of J.
A: Power is defined as the rate at which energy is expensed or rate of doing work. P=Et
Q: A clock consumes 1.5 W of electrical power. How much energy does it use in each day?
A: In a day there are 24 hours, therefore, total time (t) in seconds will be,
Q: Which uses more energy, a 250 W TV set in 1 hr, or a 1200 W toaster in 10 minutes?
A: The expression for energy in terms of power is,
Q: In the US, the conventional voltage seen in a receptacle( wall outlet) is 120 V. How many amperes is…
A:
Q: A hot water heater in a residential home runs for an average of 2.9 hours per day with a heat energy…
A: Given data: Water heater used in a day = 2.9 hours per day Power (P) = 3.5 kW Cost of electricity =…
Q: An electric clothes dryer is rated at 3,600 W. How much energy does it use in 25 min?
A: Recall P=E/t So E=Pt
Q: An electric water heater consumes 300 watts for 3 hrs per day. What is the cost of running it for…
A: The energy used per day is given as E=Ptwhere P is the per day power consumedt is the usage time…
Q: Lee watches TV for 2 hours per day. During that time, the TV consumes 150 watts per hour.…
A:
Q: Electricity prices vary widely from state to state. In Connecticut, for instance, electricity costs…
A: Electricity costs $0.209/kWh in Connecticut. The electrical power in general is given by, P=I2R…
Q: Lee watches TV for 4 hours per day. During that time, the TV consumes 200 watts per hour.…
A: Given: The TV takes the time is 4 hours per day. The cost of electricity is 15 cents/kW.h. The total…
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- The temperature near the center of the Sun is thought to be 15 million degrees Celsius ( 1.5107oC ) (or kelvin). Through what voltage must a singly charged ion be accelerated to have the same energy as the average kinetic energy of ions at this temperature?The average television set is said to be on 6 hours a day. a) Calculate the yearly cost (total cost) of electricity, in billions of dollars, required to operate 100 million TVs, assuming their power consumption averages 130 W and the cost of electricity averages 13.5 cents/kW⋅h.A standard flashlight battery can deliver about 4.9 W.h of energy before it runs down. (a) If a battery costs 80 cents, what is the cost in dollars of operating a 100 W lamp for 8.8 h using batteries? (b) What is the cost in dollars if power is provided at the rate of 6.0 cents per kilowatt-hour? (a) Number (b) Number Mi i Units Units
- Chapter 20: Problem 11: The average television set is said to be on 6 hours a day. a) Calculate the yearly cost of electricity, in billions of dollars, required to operate 100 million TVs, assuming their power consumption averages 125 W and the cost of electricity averages 10.5 cents/kW⋅h.How much electrical energy is transferred to thermal energy in 2.50 hrs by an electricalresistance of 600 ohms when the potential applied across it is 90.0V?A standard flashlight battery can deliver about 4.9 W·h of energy before it runs down. (a) If a battery costs 80 cents, what is the cost in dollars of operating a 100 W lamp for 9.0 h using batteries? (b) What is the cost in dollars if power is provided at the rate of 6.0 cents per kilowatt-hour?
- A standard flashlight battery can deliver about 2.3 W-h of energy before it runs down. (a) If a battery costs 80 cents, what is the cost in dollars of operating a 100 W lamp for 9.1 h using batteries? (b) What is the cost in dollars if power is provided at the rate of 6.0 cents per kilowatt-hour? (a) Number Units (b) Number UnitsIntegrated Concepts How much time is needed for a surgical cauterizer to raise the temperature of 1.00 g of tissue from 37.0ºC to 100ºC and then boil away 0.500 g of water, if it puts out 2.00 mA at 15.0 kV? Ignore heat transfer to the surroundings.Calculate (a) V, (b) Vop, (C) T, and (d) f for the sine wave voltage in the figure. 54 V 0.
- (a) If the cost of electricity in your area is 12 cents per kWh, what is the total cost (capital plus operation) of using a 60-W incandescent bulb for 1000 hours (the lifetime of that bulb) if the bulb cost 25 cents? (b) If we replace this bulb with a compact fluorescent light that provides the same light output, but at one-quarter the wattage, and which costs $1.50 but lasts 10 times longer (10,000 hours), what will that total cost be?At a price of $0.080/kWh, what does it cost to leave a 100-W security light on during a 10 hour night? I need a well explained answerIntegrated ConceptsHow much time is needed for a surgical cauterizer to raise the temperature of 1.00 g of tissue from 37.0oC to 100oC and then boil away 0.500 g of water, if it puts out 2.00 mA at 15.0 kV? Ignore heat transfer to the surroundings.