thank you in advance The cost of energy delivered to residences by electrical tr
ID: 2273612 • Letter: T
Question
thank you in advance
The cost of energy delivered to residences by electrical transmission varies from $0.070/kWh to $0.258/kWh throughout the United States; $0.110/kWh is the average value. At this average price, calculate the cost of leaving a 120-W porch light on for two weeks while you are on vacation? $ At this average price, calculate the cost of making a piece of dark toast in 3.00 min with a 960-W toaster? $ At this average price, calculate the cost of drying a load of clothes in 40.0 min in a 5.10 x 103-W dryer? $Explanation / Answer
a)
2 Weeks -14 days
14 days =14*24 hours =336 hours
Energy consumed
E=(120/1000)*336
E=40.32 KWH
Cost =E*Average price=40.32*0.11
Cost=$4.4352
b)
3 min =(3/60) hours
E=(960/1000)*(3/60)
E=0.048 KWH
Cost =0.048*0.11
Cost=$ 0.00528
c)
40 min =(40/60) hour
E=(5.1*10^3/1000)*(40/60)
E=3.4 KWH
Cost=3.4*0.11
Cost=$0.374
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