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What is the average amount of electricity used by a computer?
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- Why do we need to be careful about work done on the system versus work done by the system in calculations?My computer uses 15 W, if I run it for 3 hours how many Joules have I used?Compare the cost to make 48 kg of ice using two different refrigerators; one has a COP of 5.00 and the other has a COP of 6.00. Electricity costs $0.10 per kWh. Using the same assumptions given in the example, find the cost difference (in dollars) between the refrigerators to freeze the water.
- When an electric company can’t meet its customers’ demand for electricity on a hot summer day, should the problem be called an “energy crisis” or a “power crisis”? Explain.A hydroelectric power plant operates at its rated power of 7 MW. If the plant has produced 26 million kWh of electricity in a specified year, determine the number of hours the plant has operated that year. 2893 hours 1125 hours 8760 hours 2460 hours O 3714 hours16a)Based on our learning from the practical ‘Determining the cost of boiling water’, suppose that I make several flasks of hot water, so I let my 2000W kettle boil for 15 minutes in total. At R1.50/kWh, how much does this cost me?
- Academic Departments ETC - CIMS e-Services A stationery shop use the following electric appliances: (i) Three Air Conditioner of rating 1600 W for ten hours each day (ii) Two Electric water heater of rating 1000W each for 6 hours each day (lii) Twelve electric tube lights of rating 20W each for 12 hours each day. Calculate the electricity bill of the stationery shop for the month of November 2020 if the cost per unit of electric energy is 15 Bz/ kWh. on ) Electrical Energy(in kWh) consumed by three Air conditioners of rating 1600 W for 10 h of each day= 1) Electrical Energy(in kWh) consumed by two Electric Heaters of rating 1000 W for 6 h of each day= (1) Electrical Energy(in kWh) consumed by twelve Tube light of rating 20 W for 12 h of each day = (iv) Total energy(in kWh) consumed in the month November'2020 = (V) Electricity bill(in riyals) for the month of November'2020 = Next page - Problems for Practide DC. circuits O Type here to search Jump to Upload your Homework 2 AnswerHere is an extract from our electricity bill. The coloured text has been added to highlight the rate, with the 'rate' being the price per kW.hr: We buy electrical energy at ENERGY RATE COST USED 92 Days 294.3 kWh 24.9000c $73.27 ENERGY PURCHASED RATE CREDIT (03/12/13 - 04/03/14) 92 Days 6.6000c 883.4 kWh $58.30 but we sell them (solar) electrical energy at Over the 92 days of this bill, what is the average rate at which the company supplied energy to this household? P = Watts. (Take the 92 days as 2 significant figures: the electricity meter is read by an employee whose time of reading could be at any time during the day.) Also, don't give an answer, but think about how many 'labourers' (using the example in the lesson) we would need to employ to provide energy at this average rate.Suppose a heart defibrillator consumes 425 j of energy in 10.5 ms. What is the average power output of the defibrillator, in W? 
- The average electricity consumption of a house in Gainesville is known to be 1,036 kWh in a month (One month = 30 days). They would like to install solar panels of 30 % efficiency to generate this electricity. Given that the average solar power density in Gainesville is 5.47 kWh/m2/day, how much surface area must the panels occupy? Calculate the result in m² but do not write the unit. Round off you E swer to a whole number (zero decimal place.)A clothes dryer uses 3,000 watts when the motor is running. A newer model uses 400 watts when the motor is running. For both models, a single drying cycle takes 1 hour to complete. Suppose that a family uses their clothes dryer four times per week and electricity costs $0.15 per kilowatt-hour. How much money will the family save in a single year if they replace their clothes dryer with a newer model? $81 $154 $223 $500In a household during a particular week three 2kW fires are used on average 25 h each and eight 100W light bulbs are used on average 35 h each. Determine the cost of electricity for the week if 1 unit of electricity costs 12.82 p.