Daily Questions #22. What would your “ideal” life look like? What will it take to get there? Name 1 way someone can save money around your house. Name another way someone can save money around your house. Name 1 way someone can save RESOURCES in their house.
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What would your “ideal” life look like?
What will it take to get there?
Name 1 way someone can save money around your house.
Name another way someone can save money around your house.
Name 1 way someone can save RESOURCES in their house.
Why would conserving resources be important?
Here is a formula:
[(watts x hours) / 1000] x .14 = cost per day.
How much does running 1, 60 watt light bulb for 8 hours a day cost?
What would that light bulb cost me per year to operate?
What does it mean to say “If you don’t have a goal, you will never reach it.”
What does it mean to say “The early bird gets the worm?”
Lets say you have 10 light bulbs in your house. They are all 60 watts. You use them 6 hours a day. How much does that cost you per year?
Lets say you have 10 light bulbs in your house. You replace them with CFL bulbs that use 14w. You use them 6 hours a day. How much does that cost you per year?
Lets say you have 10 light bulbs in your house. You replace them with LED bulbs that use only 8w. You use them 6 hours a day. How much does that cost you per year?
Formula! ([total watts x hours] / 1000) x $.13 x days = COST
There are (2012) 7.5 BILLION people on the planet. In 2050 estimates reach 9.6 BILLION people.
So we could take EVERY SINGLE PERSON in North America AND South America and DOUBLE it, and even squeeze in ALL of South America Again.
*Renewable resources can be replenished over a short period of time (months, years, decades)
*NON-Renewable resources takes millions of years or does not renew at all!
Work is the transfer or transformation of energy from one thing (or place) to another by force.
What is our greatest source of energy?
How can you trace everything you have encountered today back to that source of energy?
- breakfast, lunch
What are some examples of work that you have completed today?
- cars, trains, boats, airplanes, bicycles etc…
Energy makes cakes for us in the oven and cools our drinks in the fridge
Energy plays our favorite songs on our IPODS
Energy lights our homes
It allows our bodies to grow and our minds to think.
Energy is the ability to do work and humans have learned to change energy from one form to another so that we can perform work easier and more comfortably.
90% of our energy in the USA comes from NON RENEWABLE fossil fuel resources.
Watts x hours / 1000 x 0.14 x days = cost
Quiz on this tomorrow…
Watts x hours / 1000 x $.20 x days = cost
Energy is measured in units called JOULES. Named after James Prescott Joule. It is the energy exerted (work) by one NEWTON needed to move an object a distance of 1 meter. 1J=1Nm
Just like DOLLARS represents value to money.
Watts = a unit of power = joules per second. Its how we analyze the “power” used. The more watts, the more power, the brighter the light, for example.
So a 60 watt light bulb, uses 60 joules per second. So if you have a light on for 1 minute (sixty seconds) you have used 3600 joules of energy. A 20w light bulb uses less joules/s thus less power, thus costs less to operate.
Calories are another unit of energy. The food calorie measures the amount of potential energy carried by the molecules in the food you eat.
Specifically 1 calorie is the amount of energy it takes to raise 1 gram of water 1 degree.
1 joule = 0.239005736 calories
A double-double with onion is 670 calories (burger
only) French fries = 400 calories.
Coke = 198 calories
Double double meal = 1268 calories or appr. 5308 joules of energy. About HALF of the total energy most people need per DAY!
So you could power (1) 60w light bulb for 1.5 minutes to equal the same amount of energy as eating a double double meal.
What does that tell you about the energy you use in your house?
The energy you use in your house is measured in kWh (kilo-watt / hours) or 1000 watts per hour. That is how you get charged, per hour.
1 kWh is about 3,600,000 joules and costs you about 0.12 - 0.18 cents depending on what time of the day you use the energy and how much you use. Peak demand (between 12-5pm) is more expensive because more people are using at that time so they charge you more.
So Check it…
Running a 60 watt light bulb for 4 days (about 16 hours, about 4 hours/day average) would cost you between 0.12 and 0.18 cents. For ONE light bulb.
Replacing that light bulb with a 13 watt CFL (60w equivalent) (sno-cone light), for the same .12-.18 cents, you could run that light for about 19 days!
Replacing that 60 watt light bulb for a 8 watt LED light bulb will allow you to run that light for about 36 days for .12 - .18 cents!.
This does NOT calculate the amount of heat put off by each bulb.
Regular bulb = 350 degrees (OUCH)
CFL = 80-85 degrees (better)
LED = 30-40 degrees (cool as ice )
The first incandescent light bulb was created in 1800 by Humphrey Davy. He used carbon attached to a battery to produce an “arc” which gave off light. It only lasted for a minute or less but the idea had been born. The light bulb had been improved and eventually patented via Thomas Edison. He failed around 1400 times to find a proper filament before he found a suitable material.
The Incandescent light bulb uses electricity
passed through a tungsten filament which
then heats up (to temperatures above 2,000
degrees) in an oxygenless atmosphere.
They are only 5% efficient viz. 95% of
the energy is lost as heat.
Governments have passed measures to prohibit the sale of incandescent light bulbs. Brazil and Venezuela started in 2005, other nations planning phase-outs: Australia, Ireland and Switzerland in 2009; Argentina, Italy, Russia and the United Kingdom by 2011; Canada in 2012; and the U.S. between 2012 and 2014
LOOK IN YOUR PACKET!!!!!
Answer these questions on the BACK of the packet.
The CFL was first invented in 1890 by Peter Cooper Hewitt, but improved with the spiral design in 1976 by Edmund Germer. There are different types of CFL’s. Tubular and spiral. The spiral is slightly less efficient because of the phosphorous build up near the base.
CFL’s give off the same amount of visible light while consuming less power (watts) and last more than 10x longer than incandescent bulbs. CFL’s are up to 75% efficient while only giving off about 85 degrees of heat. CFL’s contain mercury (Hg) which make them toxic if broken and require recycling.
All Fluorescent lamps have a ballast. A ballast controls the flow of electricity to emit ultra violet light, that UV light reacts with the phosphorus (white stuff) to emit light.
The LED, or light emitting diode is a PNP transistor that gives off a color of light if electricity flows in a single direction. The first LED technology was used in the 1960’s. Depending the elements used, a different color LED can be achieved. Gallium, Arsenic, and Phosphorus or GaAsP or GAP were combined to create a red LED.
LED’s are used in many applications, recently to replace regular light bulbs.
LED’s are up to 95% efficient and only get to be about 45 degrees. Cool to the touch.
Comparing Costs The best way to compare the three types of bulbs is to calculate their costs over the same amount of time. Since an LED bulb lasts 50,000 hours (15 years) of usage, that will be our measuring guide.
Standard incandescent bulbs The CFL used here has a lifetime of 1,300 hours, so we would need 23 bulbs over the period of this study. I was able to purchase a single incandescent of this type for $0.34, so our total cost for bulbs over 30,000 hours would be $7.82.
As it uses 60 watts, over a period of 30,000 hours, an incandescent bulb would use 1,800,000 watt hours, or 1,800 kilowatt hours. At the current approximate price of $0.10 per kilowatt hour, you would have to pay $180.00 to run an incandescent bulb over this period.
Thus, the total cost of a 60 watt incandescent bulb over a 30,000 hour lifespan is $187.82. (energy + cost of light bulb(s))
So what are the drawbacks of using incandescent lights?
Comparing CostsThe best way to compare the three types of bulbs is to calculate their costs over the same amount of time. Since an LED bulb lasts 50,000 hours (15 years) of usage, that will be our measuring guide..
CFL bulbs The CFL used here has a lifetime of 8,000 hours, so we would need 3.75 bulbs over the period of this study. I was able to purchase a single CFL for $1.24, so our total cost for bulbs over 30,000 hours would be $4.65.
As it uses 13 watts, over a period of 30,000 hours, a CFL bulb would use 390,000 watt hours, or 390 kilowatt hours. At the current approximate price of $0.10 per kilowatt hour, you would have to pay $39.00 to run a CFL bulb over this period.
Thus, the total cost of a CFL bulb over a 30,000 hour lifespan is $43.65. (energy + cost of light bulb(s))
So what are the drawbacks of using CFL lights?
Comparing CostsThe best way to compare the three types of bulbs is to calculate their costs over 30,000 hours (13.7 years) of usage - the lifespan of a single LED bulb.
LED bulbs The LED bulb used here has a lifetime of 30,000-100,000 hours, so we would need only one bulb over the period of this study. Unfortunately, that single bulb has a cost of $69.00.
As it uses 7.5 watts, over a period of 10,000 hours, an LED bulb would use 245,000 watt hours, or 245 kilowatt hours. At the current approximate price of $0.10 per kilowatt hour, you would have to pay $24.50 to run an LED bulb over this period.
Thus, the total cost of an LED bulb over a 30,000 hour lifespan is $93.50 (energy + cost of light bulb(s))
So what are the drawbacks of using LED lights?
50,000 hours is about 15 years if you used the light bulb for about 6 hours AVERAGE per day.
Incandescent (60w) = $187.82 (divided by 13 years) = $14/year
CFL (14) = $43.65 (divided by 13) = $ 3.35/year
LED (7) = $93.50 (divided by 13) = $ 7.19/year
So times this number by the total number of lights you have in your house.
Homework = Go home, count the light bulbs inside and outside of your house and categorize them as either regular, CFL or LED lights, and the wattage of each light. Lets see how much your parents spend per year on light bulbs alone.
Water is California’s most precious resource. Answer the following questions based on the video you will watch.
When did the Europeans come to California?
How long was the irrigation ditch built by the spanish missionaries in the early 1700’s?
What major river do we get our water from?
Describe what ground water overdraft is.
Where do most people live in California?
Where is most of the water produced in CA?
What was the plan to capture water for year round use called?
How many people lived in CA in 1960?
How long is the California Water Project aquaduct?
Water for 2/3 of California’s people is sent through which Delta?
What are 4 things you could do at home to conserve water?