A large household air conditioner may consume 13.0 kW of power. What is the cost (in $) of operating this air conditioner 2.58 h per day for 30.0 d if the cost of electricity is $0.121 per kW.h? (You do not need to enter any units.)
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- 3:12 24 1.13 Apply the grid method to calculate the cost in U.S. dollars to operate a pump for one year. The pump power is 20 hp. The pump operates for 20 hr /day, and electricity costs $0.10 per kWh.If a blow dryer uses 1.1 x 10³ J of energy, and it is in use for 15 minutes, what is its power? the answer is... a. 990 W b. 1.2 W c. 4400 W d. 18 000 W e. 980 WA standard computer has a power supply of 550 W, and many people just leave their computer on all thetime. Calculate the amount of money it costs to run a 550 W computer for 24 h, if electricity costs 7.5¢/kWh.
- A typical incandescent reading lamp runs at 60W. If it is left on constantly, a) how much energy (in MJ) is consumed per day, and b) what is the weekly cost (in $) if energy is charged at a rate of 12.5 cents per kilowatthour? Write your answer in two (2) decimal placesa) When she went away for the weekend, Celia left her TV on by mistake. The TV has a power rating of 200.0 W. She was away from 6 p.m. on Friday night until 9 p.m. on Sunday. How much energy did leaving the TV on use? Give your answer in kWh. b) If electricity costs 11.3 ¢per kWh, find out how much leaving the TV on costs her. I attached my answer below. I am just wondering if the time is 51h becasue it is 6:00pm on Friday to 9:00pm on Sunday or if it is 3h. My Answer: a) P=200.0W/1000kW=0.2kW Δt=51h ΔE= ? ΔE=PΔt =(0.2kW)(51h) =10.2kWh Therefore, leaving the TV on used 10.2kWh of energy. b) ΔE=10.2kWh rate=11.3¢/kWh Cost= ? Cost=(ΔE)(rate) =(10.2kWh)(11.3¢/kWh) =115.26¢ =$1.15 Therefore, leaving the TV on cost $1.15.Electric energy is to be stored at a condensers station in which 5000 are connected in parallel. The capacity of each condenser is 200 µF. The system is to be charged to a P.D. of 50 kilovolt with a power supply which costs at a rate of Rs 1 per kilowatt hour. Calculate the cost of storing.
- What is the cost of operating a 5.00 W electric clock for a year if the cost of electricity is $0.0705 per kW.h?A person used his 1500 W air-conditioning unit for 5 h every day during the month of June. How much did it cost him for using his air conditioner if electricity is priced at $8.17/??∙h??2) Estimate the rate at which energy flows from a gasoline pump to a motor vehicle during a “ fill-up. ” Express your answer in kW. If this rate of energy delivery were electric power, roughly how many people would it serve, assuming a typical US residential community? Make the following assumptions: the HHV of 1 gallon of gasoline is 145,000 Btu; it takes 5 minutes to fill up a 16-gallon auto tank; and a 1 GW e electrical plant serves a residential community of 1 million people.
- An electric water heater consumes 5.00 kW for 2.00 h per day. What is the cost of running it for one year if electricity costs 12.0 cents/kW ⋅ h ?Convert the following: 2348.8 kW to BTU/s 105.98 m³/kg to ft³/lb 3854.8 gal/min to m³/sA clothes dryer uses 3000 W and is run fro 1 hour. If the total useful energy to dry the clothes is 1.7 X 10 to the power of 5 J, what is the efficiency of the dryer?