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Presentation on theme: "Warm up for 1/5-1/6 PHONES UP! You will need INB."— Presentation transcript:

1 Warm up for 1/5-1/6 PHONES UP! You will need INB.
Turn in Tragedy of the Commons to the tray. Write these vocab words in day 1 of warm ups and try to define the following to the best of your abilities Power Horsepower Kilo Mega Kilowatt hour (kWh)

2 Warm up for 1/5-1/6 Define the following
Power- amount of work being done per time Horsepower- automobile industry. 1 HP = 746 watts Kilo- 1,000 or 10^3. 1KW= 10^3 watts Mega – 1,000,000 or 10^6. 1MW= 10^6 watts kWh- 1,000 watt hours or 3.6 megajoules (billing unit for energy delivered by electric companies)

3 What you will need today
INB Pen/Pencil Calculator Outline page 8 of INB with this picture  PHONES UP

4 Warm up for 1/9-1/10 Only write your response. You do not have to copy down the prompt. There are 5 parts to this problem. We are starting with the first part. Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing?

5 Thorpeville is a rural community with a population of 8,000 homes
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing? Look at Day 1 Warm up What is the conversion of MW to Watts? 20MW X ? 1

6 20MW (1 X 10^6 watts) X X ? 1 1MW Look at Day 1 Warm up
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing? Look at Day 1 Warm up What is the conversion of watts to kilowatts? 20MW (1 X 10^6 watts) X X ? 1 1MW

7 Now what? You have kW, but it’s looking for kWh per year!!!
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing? 1 kW 20MW (1 X 10^6 watts) = 2 X 10^4 kW X X 1 1MW 10^3 watts Now what? You have kW, but it’s looking for kWh per year!!!

8 1 kW 20MW (1 X 10^6 watts) X X = 2 X 10^4 kW 1 1MW 10^3 watts
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing? 1 kW 20MW (1 X 10^6 watts) X X = 2 X 10^4 kW 1 1MW 10^3 watts Look at the problem. What number would you use to have an end result of kWh 1 year (2 X 10^4 kW) ? X 1

9 1 kW 20MW (1 X 10^6 watts) X X = 2 X 10^4 kW 1 1MW 10^3 watts
Thorpeville is a rural community with a population of 8,000 hoURS. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) The existing power plant runs 8,000 hours per year. How many kWh of electricity is the current plan capable of producing? 1 kW 20MW (1 X 10^6 watts) X X = 2 X 10^4 kW 1 1MW 10^3 watts (2 X 10^4 kW) 8,000 hours = 16,000 x 10^4 kWh/yr = 1.6 X 10^8 kWh/year X 1 1 year

10 Warm up for 1/11-1 /12 PUT UP PHONES
Only write your response. You do not have to copy down the prompt. There are 5 parts to this problem. We are starting with the second part. Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) How many kWh of electricity do the residents of Thorpeville consume in one year?

11 (1 X 10^4 kWh/home) 8 x 10^3 homes = 8 x 10^ 7 kW/ year X 1 1 year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) ) How many kWh of electricity do the residents of Thorpeville consume in one year? (1 X 10^4 kWh/home) 8 x 10^3 homes = 8 x 10^ 7 kW/ year X 1 1 year

12 Warm up for 1/13-1 /17 PUT UP PHONES
Only write your response. You do not have to copy down the prompt. There are 5 parts to this problem. We are starting with the third part. Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines?

13 Thorpeville is a rural community with a population of 8,000 homes
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? Look for kWh for 20 years Look at Day 3 of warm ups. What was the kWh used per house in Thorpeville?

14 8 X 10^7 kWh X ? year Look for kWh for 20 years
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh X ? year Look for kWh for 20 years

15 Thorpeville is a rural community with a population of 8,000 homes
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = ? year

16 = 1.6 x 10^9 kWh (kWh for 20 years) 8 X 10^7 kWh 20 years X year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? = 1.6 x 10^9 kWh (kWh for 20 years) 8 X 10^7 kWh 20 years X year Direct cost for 20 years: 10 turbines X ?

17 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year Direct cost for 20 years: 10 turbines X $2.5 x 10^6 turbine

18 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year Direct cost for 20 years: 10 turbines X $2.5 x 10^6 = $2.5 x 10^7 turbine ? Cost/kWh=

19 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year = $2.5 x 10^7 Direct cost for 20 years: 10 turbines X $2.5 x 10^6 turbine $2.5 x 10^7 Cost/kWh= ?

20 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year = $2.5 x 10^7 Direct cost for 20 years: 10 turbines X $2.5 x 10^6 turbine $2.5 x 10^7 Cost/kWh= = ? 1.6 x 10^9 kWh

21 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity consumption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year = $2.5 x 10^7 Direct cost for 20 years: 10 turbines X $2.5 x 10^6 turbine $2.5 x 10^7 Cost/kWh= = $1.6 x 10^-2/ kWh = $0.016/ kWh 1.6 x 10^9 kWh

22 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Assuming that the population of Thorpeville remains the same for the next 20 years, and that electricity conmption remains stable per household, what would be the cost (expressed in $ per kWh) of electricity to the residents over the next 20 years if they decide to go with wind turbines? 8 X 10^7 kWh 20 years X = 1.6 x 10^9 kWh (kWh for 20 years) year = $2.5 x 10^7 Direct cost for 20 years: 10 turbines X $2.5 x 10^6 turbine $2.5 x 10^7 Cost/kWh= = $1.6 x 10^-2/ kWh = $0.016/ kWh 1.6 x 10^9 kWh

23 Warm up for 1/18-1 /19 PUT UP PHONES
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Compare answers from Day 2 and Day 3 in warm up. What conclusions can you make? B) What are the pros and cons of the existing coal-burning plant compared with the proposed wind farm?

24 A) Compare answers from day 2 & 3. What conclusions can you make?
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Compare answers from day 2 & 3. What conclusions can you make? Power plant produces 1.6 x 10^ 8 kWh per year (Day 2) B) What are the pros and cons of the existing coal-burning plant compared with the proposed wind farm?

25 A) Compare answers from day 2 & 3. What conclusions can you make?
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Compare answers from day 2 & 3. What conclusions can you make? Power plant produces 1.6 x 10^ 8 kWh per year (Day 2) Residents use 8 X 10^ 7 kWh (Day 3) B) What are the pros and cons of the existing coal-burning plant compared with the proposed wind farm?

26 A) Compare answers from day 2 & 3. What conclusions can you make?
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Compare answers from day 2 & 3. What conclusions can you make? Power plant produces 1.6 x 10^ 8 kWh per year (Day 2) Residents use 8 X 10^ 7 kWh (Day 3) Subtract these 2 numbers and get an excess of 8X 10^ 7 kWh B) What are the pros and cons of the existing coal-burning plant compared with the proposed wind farm?

27 A) Compare answers from day 2 & 3. What conclusions can you make?
Thorpeville is a rural community with a population of 8,000 homes. It gets its electricity from a small, municipal coal-burning power plant just outside of town. The power plant’s capacity is rated at 20 megawatts with the average home consuming 10,000 kilowatt hours (kWh) of electricity per year. Residents of Thorpeville pay the utility $0.12 per kWh. A group of entrepreneurs is suggesting that the residents support a measure to install 10 wind turbines on existing farmland. Each wind turbine is capable of producing 1.5MW of electricity. The cost per wind turbine is $2.5 million dollars to purchase and operate for 20 years. A) Compare answers from day 2 & 3. What conclusions can you make? Power plant produces 1.6 x 10^ 8 kWh per year (Day 2) Residents use 8 X 10^ 7 kWh (Day 3) Subtract these 2 numbers and get an excess of 8X 10^ 7 kWh At a rate of $0.12 per kWh this provides a surplus of $0.96 x10 ^ 7 B) What are the pros and cons of the existing coal-burning plant compared with the proposed wind farm? Wind: cheaper, no heavy metal or radioactive emissions, No pollution, Wind is free Coal: more expensive, produces air pollution, labor prices,

28 Warm up for 1/20-1 /23 PUT UP PHONES
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater.

29 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles Goal is to get to gallons/ year X ? Saturday

30 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X ? Goal is to get to gallons/ year X Saturday cycle

31 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons Goal is to get to gallons/ year X X ? Saturday cycle 1 minute

32 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons 52 Saturdays = ? X X Saturday cycle 1 minute 1 year

33 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons 52 Saturdays = 18,720 gallons/ year X X Saturday cycle 1 minute 1 year Goal is to get to $/ year

34 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons 52 Saturdays = 18,720 gallons/ year X X 1 year Saturday cycle 1 minute 18,720 gallons X ? year Goal is to get to $/ year

35 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons 52 Saturdays = 18,720 gallons/ year X X Saturday cycle 1 minute 1 year 18,720 gallons 0.30 kWh X ? X 1 gallon year Goal is to get to $/ year

36 An electric water heater requires 0. 30 kWh to heat a gallon of water
An electric water heater requires 0.30 kWh to heat a gallon of water. The thermostat is set to 150 degrees Fahrenheit. The cost of electricity is $0.20 per kWh. A washing machine with a flow rate of 6.0 gallons per minute runs four times each Saturday. Each time it runs it takes in water for a total of 15 minutes. How much total water does the washing machine use in one year? Calculate the annual cost of the electricity for the washing machine, assuming that 3.0 gallons per minute of the water used by the machine comes from the hot-water heater. 4 cycles 15 minutes X 6.0 gallons 52 Saturdays = 18,720 gallons/ year X X cycle 1 minute 1 year Saturday $0.20 18,720 gallons 0.30 kWh X ? = X 1 gallon kWh year Goal is to get to $/ year

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