A standard computer has a power supply of 550 W, and many people just leave their computer on all the time. Calculate the amount of money it costs a company to run a 550 W computer for a week, if electricity costs 11.2 ¢/kWh. 1-

Q: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

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Q: You have a 1300 W toaster. How much electrical energy in Joules is needed to make a slice of toast?…

A: The objective of the question is to calculate the electrical energy consumed by a toaster in Joules…

Q: How much electrical energy (in kilowatt hours) would a 45.0 W light bulb use in 60.0 days if left on…

A: Given that                     The power of the bulb is (P) = 45W                      Time = 60days…

Q: Answer all three parts What is the power dissipated by R2? What is the potential difference…

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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: A camera requires 5.0 J of energy for a flash lasting 1.0 ms. (a)What power does the flashtube use…

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Q: Find the power supplied by the battery. 502 50V 200N 1002 252

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Q: The cost of electricity varies widely throughout the United States; $0.120/kWh is a typical value.…

A: Given, Electricity cost = 0.12$/kWh And power P=Et So, E=P.t a) Power = 40W total time, t =7days=…

Q: How much does it cost to operate a 695W heater for exactly 30.0 min if electrical energy costs…

A: Given, Power, P = 695 W time, t = 30.0 min cost of electrical energy, C = $0.060 per kW.h

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 car battery has a voltage of ε = 12 V. To turn the starter on a car the battery must supply I =…

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Q: 5. V (V) I (A) R (0) 100 V 1 2 www R₁ = = 250022 3 -ww .= 500Ω R= 4 R₁₂= = 10.0000 ww 5 34 R3 = . =…

A: Given:-  A circuit is given here as  R1= 2500Ω    R2= 10000 ΩR3= 1000 Ω     R4= 1500 ΩR5 = 500ΩV =…

Q: What is the yearly cost, in dollars, of operating such a clock if the cost of electricity is $0.125…

A: Power of clock (P) = 3.1 W cost of electricity = $0.125 per kWh

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

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Q: Calculate the cost of leaving 1300 W refrigerator for a year, if the electric company charges you 12…

A: Write the formula for the total amount of power used in a year. Ptotal=watts×hours used per day×days…

Q: Suppose you use 60 kWh (kilowatt hours) of electricity at $0.31 per kWH, 96 kWh at $0.27 per kWh,…

A: Given data:   The electricity used  E1 =  60 kWh E2 = 96 kWh E3 = 87 kWh Required: The total kWh of…

Q: An older electric water heater uses 10.0 of power while it's on, but it's only on for 2 hours every…

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Q: Energy c o s t s $ 0.053/kWAh. A toaster, rated at1.0 kWAh, is used for a total of 30 minutes per…

A: The kilowatt-hour (kWh) is the unit of energy equivalent to 1 kilowatt (kW) of power expended for 1…

Q: A utility company charges 8.5 cents/kWh. If a consumer operates a 40-W light bulb continuously for…

A: A utility company charges 8.5 cents/KWh.   if a consumer operates a 40-W bulb continuously  for one…

Q: A refrigerator using 1028 W runs one-third of the time. How much does the electricity cost to run…

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Q: One heater uses 330 W of power when connected by itself to a battery. Another heater uses 350 W of…

A: Given:- The first heater which is connected to the battery of V voltage uses a power  P1 = 330 W The…

Q: A 100-W light bulb is left on for 10.0 hours. Over this period of time, how much energy was used by…

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Q: ne 9-volt battery contains 19.7 thousand joules of energy.  A 4-pack of 9-volt batteries cost $10.31…

A: The energy in one battery E =19.7×103 J Total energy of 4 pack 9V battery is 4E The power is 1 Watt…

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: For R1=7, R2=14, R3=1, R4=11, R5=18, R6=6, R7=5 and V1=120 V in the Figure, find the following: R1…

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.