Today's Most Popular Websites on the Internet:

The following list of the Most Popular Websites was updated on Wednesday, January 5th 2011... 1. Google.com www.google.com 2. Facebook.com www.facebook.com 3. Youtube.com www.youtube.com 4. Yahoo.com www.yahoo.com 5. Live.com www.live.com 6. Baidu.com www.baidu.com 7. Wikipedia.org www.wikipedia.org 8. Blogspot.com www.blogspot.com 9. Qq.com www.qq.com 10. Twitter.com www.twitter.com 11. Blogger.com www.blogger.com 12. Yahoo.co.jp www.yahoo.co.jp 13. Amazon.com www.amazon.com 14. Taobao.com www.taobao.com 15. Google.co.in www.google.co.in 16. Sina.com.cn www.sina.com.cn 17. Google.de www.google.de 18. Google.com.hk www.google.com.hk 19. Wordpress.com www.wordpress.com 20. Linkedin.com www.linkedin.com 21. Ebay.com www.ebay.com 22. Google.co.uk www.google.co.uk 23. Microsoft.com www.microsoft.com 24. Yandex.ru www.yandex.ru 25. Google.fr www.google.fr 26. Bing.com www.bing.com 27. Google.co.jp www.google.co.jp 28. 163.com www.163.com 29. Google.com.br www.google.com.br 30. Fc2.com www.fc2.com 31. Craigslist.com www.craigslist.com 32. Conduit.com www.conduit.com 33. Google.it www.google.it 34. Flickr.com www.flickr.com 35. Vkontakte.ru www.vkontakte.ru 36. > Charlotte.craigslist.org www.charlotte.craigslist.org 37. Apple.com www.apple.com 38. Googleusercontent.com www.googleusercontent.com 39. Craigslist.org www.craigslist.org 40. Google.es www.google.es 41. Go.com www.go.com 42. Imdb.com www.imdb.com 43. Bbc.co.uk www.bbc.co.uk 44. Livejasmin.com www.livejasmin.com 45. Sohu.com www.sohu.com 46. Ask.com www.ask.com 47. Google.ru www.google.ru 48. Aol.com www.aol.com 49. Google.com.mx www.google.com.mx 50. Soso.com www.soso.com

How to Calculate a House's Electrical Load

           

                  Calculating your house's electrical load can help you learn where you are spending money on electricity and give you options on lowering your utility bill. There is not an exact science to calculating the electrical load of a home, but here are a few steps that will help you get a good overview of how you use electricity in your house.

Instructions

1. Know what you want to calculate. This can seem difficult but it's really not too hard once you learn the terms. Most electrical appliances are rated with watts, while some use amps. To convert amps to watts, multiply the number of amps by 120. You do this because U.S. home electric outlets use 120 volts, and volts multiplied by amps equal watts. The number you want to find is how many kilowatt hours (kWh) you are using.
   
   
2. Create a log of what electrical appliances you use and how long you use them at a time. Keep in mind things that you do not actively control like heating or cooling units, water heaters and refrigerators. Make a list over several days of all the appliances you used, to find a good average on each.
   
   
3. Check the labels on your electrical appliances. This is a start to calculate your electrical load and is a good way to get an idea of how much power each appliance uses. One thing to remember is that the number on the label is the maximum watts that appliance will use in an hour, so a refrigerator for instance will only use a small amount of power unless the compressor is running at which time it will use closer to the maximum power.
   
   
4. Estimate the amount of watts you use per appliance a day. If you need help for appliances like heating and cooling units, water heaters or other passive appliances, you can find many estimations on the Internet with a simple web search.
   
   
5. Calculate the kWh use for each appliance. The formula for kWh is watts multiplied by hours used and then divided by 1000. For instance, a 100-watt light bulb used for 10 hours would use one kWh.
   
   
6. Add all of the kWh results from your appliances to get an idea of your electrical load that you use every day.
   
   
7. Use a watt-meter to get a better idea of how much electricity individual appliances use. A watt-meter will connect between your appliance's plug and the wall outlet and it will tell you how much electricity the appliance uses over time. This is a good way to get a more exact calculation.
   

Useful Formulas

Here are some common formulas that are frequently
used in the field.

 

E = Voltage / I = Amps /W
= Watts / PF = Power Factor / Eff = Efficiency / HP = Horsepower

AC/DC Formulas
To Find	Direct Current	AC / 1phase 115v or 120v	AC / 1phase 208,230, or 240v	AC 3 phase All Voltages
Amps when Horsepower is Known	HP x 746 E x Eff	HP x 746 E x Eff X PF	HP x 746 E x Eff x PF	HP x 746 1.73 x E x Eff x PF
Amps when Kilowatts is known	kW x 1000 E	kW x 1000 E x PF	kW x 1000 E x PF	kW x 1000 1.73 x E x PF
Amps when kVA is known		kVA x 1000 E	kVA x 1000 E	kVA x 1000 1.73 x E
Kilowatts	I x E 1000	I x E x PF 1000	I x E x PF 1000	I x E x 1.73 PF 1000
Kilovolt-Amps		I x E 1000	I x E 1000	I x E x 1.73 1000
Horsepower (output)	I x E x Eff 746	I x E x Eff x PF 746	I x E x Eff x PF 746	I x E x Eff x 1.73 x PF 746

Three Phase Values

For 208 volts x 1.732, use 360 For 230 volts x 1.732, use 398 For 240 volts x 1.732, use 416 For 440 volts x 1.732, use 762 For 460 volts x 1.732, use 797 For 480 Volts x 1.732, use 831

E = Voltage / I = Amps /W
= Watts / PF = Power Factor / Eff = Efficiency / HP = Horsepower

AC Efficiency and Power Factor Formulas
To Find	Single Phase	Three Phase
Efficiency	746 x HP E x I x PF	746 x HP E x I x PF x 1.732
Power Factor	Input Watts V x A	Input Watts E x I x 1.732

Power - DC Circuits

Watts = E xI

Amps = W / E

Ohm's Law / Power Formulas
	P = watts I = amps R = ohms E = Volts

Voltage Drop Formulas
Single Phase (2 or 3 wire)	VD =	2 x K x I x L CM	K = ohms per mil foot  (Copper = 12.9 at 75°) (Alum = 21.2 at 75°) Note: K value changes with temperature. See Code chapter 9, Table 8 L = Length of conductor in feet I  = Current in conductor (amperes) CM = Circular mil area of conductor
	CM=	2K x L x I VD
Three Phase	VD=	1.73 x K x I x L CM
	CM=	1.73 x K x L x I VD

Nature’s Fury: 30 Chilling Photos of Natural Hazards

Supercell Thunderstorm in Montana - Photograph by Sean Heavey


From violent volcanoes to horrifying hurricanes, Mother Nature’s fury is a sight to behold. With so much human conflict and suffering, we often underestimate the awesome and destructive power of nature. While the science behind these events is utterly fascinating, the consequences can be dire and we must respect the power of the planet we live in. Here are 30 chilling reminders of nature’s fury:

2. Chaiten Volcano - Chana, Chile (May 2008)

Photograph by Carlos Gutierrez

3. Forest Fire - Dolginino, Russia (Aug. 2010)

Photograph by ARTYOM KOROTAYEV/AFP/Getty Images

4. Undersea Volcano - Coast of Tonga (March 2009)

Photograph by Dana Stephenson/Getty Images

5. Kliuchevskoi Volcano - (Russia Sept. 1994)

Photograph by NASA-Johnson Space Center

6. Double Cyclone - Iceland (Nov. 2006)

Photograph by NASA/Jesse Allen

7. Flooding (from Typhoon ‘Ketsana’) - Manila, Phillippines (Sept. 2009)

Photograph by Jay Directo/AFP/Getty Images

8. Tornado - Oklahoma, United States (May 2010)

Photograph by Willoughby Owen

9. Hurricane Felix - Honduras (Sept. 2007)

Photograph by NASA

10. Lightning Strike - New York City (2010)

Photograph by Jay Fine

11. Mt. Saint Helens Volcano - Washington, United States (May 1980)

Photograph by USGS

12. Flooding - Cedar Rapids, Iowa (June 2008)

Photograph by David Greedy/Getty Images

13. Mount Merapi Volcano - Indonesia (Nov 2010)

Photograph by SONNY TUMBELAKA/AFP/Getty Images

14. Chaiten Volcano - Chana, Chile (May 2008)

Photograph by ALVARO VIDAL/AFP/Getty Images

15. Dust Storm - China (April 2001)

Photograph by NASA/Jesse Allen, Robert Simmon/MODIS science team

16. Mt. Saint Helens Volcano - Washington, United States (Aug. 1980)

Photograph by AP Photo/USGS, Lyn Topinka

17. Lightning Storm - Roswell, New Mexico (July 2010)

Photograph by AP Photo/Roswell Daily Record, Mark Wilson

18. Brush Fires - Sylmar, California (Sept. 2009)

Photograph by Justin Sullivan/Getty Images

19. Eyjafjallajokull Volcano - Iceland (April 2010)

Photograph by Reuters/Lucas Jackson

20. Flooding (Tropical Storm Agatha) - Guatemala (May 2010)

Photograph by Reuters/Casa Predicencial

21. Undersea Volcano - Tonga (March 2009)

Photograph by LOTHAR SLABON/AFP/Getty Images

22. Wildfires - California (Sept. 2009)

Photograph by Kevork Djansezian/Getty Images

23. Dust Storm - Australia (Sept. 2009)

Photograph by NASA/JPL

24. Flooding - Iowa, United States (June 2008)

Photograph by AP Photo/Jeff Roberson

25. Mt. Etna Volcano - Sicily, Italy (Oct. 2002)

Photograph by NASA-Johnson Space Center

26. Eyjafjallajokull Volcano - Iceland (April 2010)

Photograph by HALLDOR KOLBEINS/AFP/Getty Images

27. Brushfires - Victoria, Australia (Feb 2009)

Photograph by AP Photo

28. Tornado - Iowa, United States (June 2008)

Photograph by AP Photo/Lori Mehmen

29. Chaiten Volcano - Chana, Chile (May 2008)

Photograph by AP Photo/La Tercera

30. Storm Clouds - South Dakota, United States (2009)

Brick Road Making

      Tiger-Stone is a Dutch paver laying machine that can produce brick roads. Paving bricks are put onto the angled plain. As the electric crawler moves forward along a sand base layer, all the stones are packed together by gravity.

 　

　

　

　

　

　

World in Canyons