Monday, January 24, 2011

I Have A Dream


On August 28, 1963, Dr. Martin Luther King, Jr. gave a speech at the Lincoln Memorial in Washington, D.C.

The most famous part of the speech includes these words:

I have a dream that my four little children will one day live in a nation where they will not be judged by the color of their skin but by the content of their character.

In this part of the speech, he hopes that the future generations to come will not misjudge each other based on skin color.

Dr. King also quoted the Declaration of Independence. He said, ...this note was a promise that all men, yes, black men and white men would be guaranteed the unalienable rights of life, liberty and the pursuit of happiness... He also quoted the songs My Country Tis of Thee, and Handel's Messiah.

Dr. King effectively used repetition, such as the line "I have a dream today," familiar quotes, imagery, and metaphor to explain what was happening to African Americans, and what he dreamed might happened in the future.

Monday, January 10, 2011

Canada



Canada is huge. In fact, it's the second largest country in the world, after Russia. Canada has ten provinces, which are New Brunswick, Nova Scotia, Ontario, Quebec, Manitoba, British Colombia, Prince Edward Island, Alberta, Saskatchewan, and Newfoundland. Canada has large areas of rugged tundra, so most people live in the southern part of the country.

The first settlers were native peoples, who came over from Asia through Alaska. Then, in the year 1000 A.D., the Vikings came over from Scandinavia and settled Vinland, now Newfoundland. About 600 years later, Samuel de Champlain came from France and founded Montreal, now one of the largest cities in Canada. On July 1, 1867, Canada gained its independence. That day is now called Canada Day.

Canada has a government like ours, but they have a prime minister instead of a president. Also like the U.S.A., the economy is a mix of manufacturing and service industries.

Canada has a beautiful landscape but also has a interesting history.


Thursday, January 6, 2011

Inertia


Newton's First Law of Motion says that objects at rest tend to stay at rest until a force pushes or pulls the objects.

To demonstrate this, I put a piece of paper on an upside-down cup, then put another, right-side-up cup on top of the paper. When I just pulled on the piece of paper, the top cup fell. However, when I held the piece of paper out and hit it with a really quick downward motion of my free hand, the paper came out without the top cup falling over!

This happened because the paper moved fast enough to overcome the friction between the cup and paper, but too fast to overcome the inertia of the top cup, so the top cup stayed at rest. This trick also worked with a piece of satin and a smooth TV tray. I was able to drop coins into a jar and keep books on the table. Using a cloth dish towel and a fabric bench top didn't change much, but the books moved a little more because of the increased friction.