Teachers cutting paper usage; kids loving it

March 30, 2009 at 8:04 pm (Uncategorized) ()

The result: homework done online. Paperless term papers. Math problems completed on an interactive whiteboard. An entire course of physics problems contained on a single compact disc. And, schools hope, savings in an ever-tightening budget crunch.

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How Much Energy Goes Into Bottled Water?

March 17, 2009 at 5:57 pm (Uncategorized) (, , )

Bottled water is a huge industry and it is still growing rapidly (far surpassing the US sales of milk and beer, and second only to soft drinks.) How much energy is used before you drink the water?

From Physorg

Researchers … have estimated the energy required to produce bottled water, including the energy required to manufacture plastic, fabricate the plastic into bottles, process the water, fill and seal the bottles, transport the bottles, and chill the bottles for use.

Combining all the energy input totals, Gleick and Cooley found that producing bottled water requires between 5.6 and 10.2 million joules of energy per liter, depending on transportation factors (a typical personal-sized water bottle is about 0.5 liters). That’s up to 2,000 times the energy required to produce tap water, which costs about 0.005 million joules per liter for treatment and distribution.

Not quite a fair comparison since they didn’t calculate how much it cost to cool tap water or wash the cup you drink from, but still, I am sure even if it were a fair comparison, bottled water would require a lot more energy.

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Space station may have to dodge space junk again

March 16, 2009 at 8:05 pm (Uncategorized) (, , )

NASA kept close tabs on an old piece of space junk Monday that threatened to come too close to the international space station as the shuttle Discovery raced toward the orbiting outpost for a 220-mile-high linkup.

The debris this time is from a Soviet military satellite called Kosmos 1275, which broke up somewhat mysteriously shortly after its 1981 launch.

More from the AP.

It seems like this is happening alot recently.  I wonder if there is more junk, if the junk there is is getting more press, or if we are sending more satalites/shuttles/space stations so we have to avoid junk more often.

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The Coconut crab

March 13, 2009 at 8:41 pm (Uncategorized)

Two large coconut crabs climbing on a tree By Mila Zinkova CC-BY-SA

Two large coconut crabs climbing on a tree

The coconut crab (Birgus latro) is the largest arthropod that lives on land.  These giants can grow big, up to 16 inches and weigh up to 9 pounds, with a leg span of 3 feet.  They an live to be more than 30 years old.  The female coconut crab carries fertilized eggs under her body for a few months, then when it is type for them to hatch, releases them into the ocean at high tide.  The larva swim freely in the ocean for 28 days then live on the ocian floor for another 28 days, living in abandoned shells (like hermit crabs).  After that, they leave the ocean for good and live on dry land.  As the get older, their abdomen hardens and they no longer need the protection of shells.

The crabs eat nearly anything organic, primarily they eat coconuts and figs but will also eat leaves, dead animals, slow living animals, and the shells (to provide calcium).

Coconut crabs live near the Indian Ocean and central Pacific Ocean particularily on islands such as Christmas Island, the Seychelles Islands, the Cook Islands, and Palmerston Island.

More info at Wikipedia

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Flowering dogwood trees

March 13, 2009 at 4:50 pm (Uncategorized) (, , , )

Flowering Dogwood blossoms
The Flowering dogwood (Cornus florida) is a deciduous tree that grows up to 30 feet high and is often wider than it is tall. The leaves are oval with pointed tips. It blooms in the early spring. The flowers themselves are hard to see, they grow in clusters with each flower having four greenish-yellow petals. These clusters of flowers are surrounded by four large white petals (some cultivars have pink or even red petals) called bracts. Late summer to early fall the bright red fruit (drupes) ripen. There can be two to ten of these for each flower cluster, each is about 10-15 mm long. The flowering dogwood tree is native to eastern North America from southern Main to Northern Florida and west to eastern Kansas.

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How to take a picture

March 13, 2009 at 1:21 am (Uncategorized)

From Uncyclopedia, how to choose between a digital and a film camera:

Digital

Digital is everything these days, but in today’s age of megapixels and megabytes, it’s complicated too. With film, you only need to choose the speed of the film. Another advantage of film over digital is that memory cards are difficult to put in the camera properly. With most cards, there are seven wrong ways and one ‘right’ way to insert the card. With odds like that, film obviously has an advantage.

Film

The primary advantage of film is that it is easy. Film comes in different speeds, so make sure you buy film that is compatible with your camera. You can put slower film in a faster camera, but for the best results, buy the fastest film that your camera supports. If your camera is old, it is best to upgrade to a model that supports the faster film.

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Hello world!

March 13, 2009 at 1:12 am (Uncategorized)

Welcome to WordPress.com. This is your first post. Edit or delete it and start blogging!

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