Sunday, April 26, 2009


Science Facts
4.5 pounds of sunlight strike the Earth each day.

A 'jiffy' is an actual unit of time for 1/100th of a second!


A ball of glass will bounce higher than a ball made of rubber.

A cesium atom in an atomic clock beats over nine billion times a second.


A cubic yard of air weighs about 2 pounds at sea level.

A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.


A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.


According to studies, men change their minds two to three times more often than women.


Airports that are at higher altitudes require a longer airstrip due to lower air density.


All Humans Are 99.9% Genetically Identical and 98.4% of human genes are the same as the genes of a chimpanzee.


Aluminum used to be more valuable than gold!


Approximately 70 percent of the earth is covered by water. Only 1 percent of this water is drinkable.


At room temperature, the average air molecule travels at the speed of a rifle bullet.


Balsa wood is classified as a hard wood!

Computer Facts


Computer Facts


Another name for a Microsoft Windows tutorial is 'Crash Course'!

Bill Gates' house was designed using a Macintosh computer.

By the year 2012 there will be approximately 17 billion devices connected to the Internet.

Domain names are being registered at a rate of more than one million names every month.

E-mail has been around longer than the World Wide Web.

For every 'normal' webpage, there are five porn pages.

In the 1980s, an IBM computer wasn't considered 100 percent compatible unless it could run Microsoft Flight Simulator*.

MySpace reports over 110 million registered users. Were it a country, it would be the tenth largest, just behind Mexico.

One of every 8 married couples in the US last year met online.

The average 21 year old has spent 5,000 hours playing video games, has exchanged 250,000 e-mails, instant and text messages and has spent 10,000 hours on the mobile phone.

The average computer user blinks 7 times a minute, less than half the normal rate of 20.

The first banner advertising was used in 1994.

The first computer mouse was invented by Doug Engelbart in around 1964 and was made of wood.

FUN USELESS FACTS 1-10


FUN USELESS FACTS 1-10


The word 'byte' is a contraction of 'by eight.'

The dollar symbol ($) is a U combined with an S (U.S.)

Maine is the toothpick capital of the world.

Barbie's measurements if she were life size: 39-23-33.

The tune for the "A-B-C" song is the same as "Twinkle, Twinkle Little Star."

Des Moines has the highest per capita Jello consumption in the U.S.

Pinocchio is Italian for "pine head."

In the last 4000 years, no new animals have been domesticated.

Great Britain was the first county to issue postage stamps. Hence, the postage stamps of Britain are the only stamps in the world not to bear the name of the country of origin.

Since 1896, the beginning of the modern Olympics, only Greece and Australia have participated in every Games.

FUN FOOD FACTS 1-10


FUN FOOD FACTS 1-10

Hershey's Kisses are called that because the machine that makes them looks like it's kissing the conveyor belt.

Reindeer like to eat bananas.


Maine is the toothpick capital of the world.


Every year, kids in North America spend close to half a billion dollars on chewing gum.


American's eat about 18 billion hot dogs a year.


The oldest piece of chewing gum is 9000 years old.


The man who played the voice of bugs bunny was allergic to carrots.

Apples are more effective at keeping people awake in the morning than caffeine.

Every time you lick a stamp you gain 1/10 of a calorie.

Yams have 10 times more vitamin C than sweet potatoes.

FUN DID YOU KNOW FACTS 1-10


FUN DID YOU KNOW FACTS 1-10


Did You Know, Donald Duck comics were banned from Finland because he doesn't wear pants.

Did You Know, The cigarette lighter was invented before the match.
Did You Know, 40 percent of McDonald's profits come from the sales of Happy Meals.

Did You Know, TYPEWRITER is the longest word that can be made using the letters only on one row of the keyboard.
Did You Know, Butterflies taste with their feet.

Did You Know, Coca-Cola was originally green.

Did You know, If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee. Did You Know, Every day more money is printed for Monopoly than the US Treasury.
Did You Know, It is impossible to lick your elbow.

Did You Know, Intelligent people have more zinc and copper in their hair.

Interesting Olympic Facts


Interesting Olympic Facts


The Official Olympic Flag
Created by Pierre de Coubertin in 1914, the Olympic flag contains five interconnected rings on a white background. The five rings symbolize the five significant continents and are interconnected to symbolize the friendship to be gained from these international competitions. The rings, from left to right, are blue, yellow, black, green, and red. The colors were chosen because at least one of them appeared on the flag of every country in the world. The Olympic flag was first flown during the 1920 Olympic Games.

The Olympic Motto

In 1921, Pierre de Coubertin, founder of the modern Olympic Games, borrowed a Latin phrase from his friend, Father Henri Didon, for the Olympic motto: Citius, Altius, Fortius ("Swifter, Higher, Stronger").
The Olympic Oath

Pierre de Coubertin wrote an oath for the athletes to recite at each Olympic Games. During the opening ceremonies, one athlete recites the oath on behalf of all the athletes. The Olympic oath was first taken during the 1920 Olympic Games by Belgian fencer Victor Boin. The Olympic Oath states, "In the name of all competitors, I promise that we shall take part in these Olympic Games, respecting and abiding by the rules that govern them, in the true spirit of sportsmanship, for the glory of sport and the honor of our teams."
The Olympic Creed

Pierre de Coubertin got the idea for this phrase from a speech given by Bishop Ethelbert Talbot at a service for Olympic champions during the 1908 Olympic Games. The Olympic Creed reads: "The most important thing in the Olympic Games is not to win but to take part, just as the most important thing in life is not the triumph but the struggle. The essential thing is not to have conquered but to have fought well."

The Olympic Flame

The Olympic flame is a practice continued from the ancient Olympic Games. In Olympia (Greece), a flame was ignited by the sun and then kept burning until the closing of the Olympic Games. The flame first appeared in the modern Olympics at the 1928 Olympic Games in Amsterdam. The flame itself represents a number of things, including purity and the endeavor for perfection. In 1936, the chairman of the organizing committee for the 1936 Olympic Games, Carl Diem, suggested what is now the modern Olympic Torch relay. The Olympic flame is lit at the ancient site of Olympia by women wearing ancient-style robes and using a curved mirror and the sun. The Olympic Torch is then passed from runner to runner from the ancient site of Olympia to the Olympic stadium in the hosting city. The flame is then kept alight until the Games have concluded. The Olympic Torch relay represents a continuation from the ancient Olympic Games to the modern Olympics.
The Olympic Hymn

The Olympic Hymn, played when the Olympic Flag is raised, was composed by Spyros Samaras and the words added by Kostis Palamas. The Olympic Hymn was first played at the 1896 Olympic Games in Athens but wasn't declared the official hymn by the IOC until 1957.

Real Gold Medals

The last Olympic gold medals that were made entirely out of gold were awarded in 1912.

The Medals

The Olympic medals are designed especially for each individual Olympic Games by the host city's organizing committee. Each medal must be at least three millimeters thick and 60 millimeters in diameter. Also, the gold and silver Olympic medals must be made out of 92.5 percent silver, with the gold medal covered in six grams of gold.

The First Opening Ceremonies

The first opening ceremonies were held during the 1908 Olympic Games in London.

Opening Ceremony Procession Order

During the opening ceremony of the Olympic Games, the procession of athletes is always led by the Greek team, followed by all the other teams in alphabetical order (in the language of the hosting country), except for the last team which is always the team of the hosting country.

A City, Not a Country

When choosing locations for the Olympic Games, the IOC specifically gives the honor of holding the Games to a city rather than a country.

IOC Diplomats

In order to make the IOC an independent organization, the members of the IOC are not considered diplomats from their countries to the IOC, but rather are diplomats from the IOC to their respective countries.

First Modern Champion

James B. Connolly (United States), winner of the hop, step, and jump (the first final event in the 1896 Olympics), was the first Olympic champion of the modern Olympic Games.

The First Marathon

In 490 BCE, Pheidippides, a Greek soldier, ran from Marathon to Athens (about 25 miles) to inform the Athenians the outcome of the battle with invading Persians. The distance was filled with hills and other obstacles; thus Pheidippides arrived in Athens exhausted and with bleeding feet. After telling the townspeople of the Greeks' success in the battle, Pheidippides fell to the ground dead. In 1896, at the first modern Olympic Games, held a race of approximately the same length in commemoration of Pheidippides.

The Exact Length of a Marathon

During the first several modern Olympics, the marathon was always an approximate distance. In 1908, the British royal family requested that the marathon start at the Windsor Castle so that the royal children could witness its start. The distance from the Windsor Castle to the Olympic Stadium was 42,195 meters (or 26 miles and 385 yards). In 1924, this distance became the standardized length of a marathon.

Women

Women were first allowed to participate in 1900 at the second modern Olympic Games.

Winter Games Begun

The winter Olympic Games were first held in 1924, beginning a tradition of holding them a few months earlier and in a different city than the summer Olympic Games. Beginning in 1994, the winter Olympic Games were held in completely different years (two years apart) than the summer Games.
Cancelle Games

Because of World War I and World War II, there were no Olympic Games in 1916, 1940, or 1944.

Tennis Banned

Tennis was played at the Olympics until 1924, then reinstituted in 1988.
Walt Disney

In 1960, the Winter Olympic Games were held in Squaw Valley, California (United States). In order to bedazzle and impress the spectators, Walt Disney was head of the committee that organized the opening day ceremonies. The 1960 Winter Games Opening Ceremony was filled with high school choirs and bands, releasing of thousands of balloons, fireworks, ice statues, releasing of 2,000 white doves, and national flags dropped by parachute.
Russia Not Present

Though Russia had sent a few athletes to compete in the 1908 and 1912 Olympic Games, they did not compete again until the 1952 Games.

Motor Boating

Motor boating was an official sport at the 1908 Olympics.

Polo, an Olympic Sport

Polo was played at the Olympics in 1900, 1908, 1920, 1924, and 1936.

Gymnasium

The word "gymnasium" comes from the Greek root "gymnos" meaning nude; the literal meaning of "gymnasium" is "school for naked exercise." Athletes in the ancient Olympic Games would participate in the nude.

Stadium

The first recorded ancient Olympic Games were held in 776 BCE with only one event - the stade. The stade was a unit of measurement (about 600 feet) that also became the name of the footrace because it was the distance run. Since the track for the stade (race) was a stade (length), the location of the race became the stadium.
Counting Olympiads

An Olympiad is a period of four successive years. The Olympic Games celebrate each Olympiad. For the modern Olympic Games, the first Olympiad celebration was in 1896. Every four years celebrates another Olympiad; thus, even the Games that were cancelled (1916, 1940, and 1944) count as Olympiads. The 2004 Olympic Games in Athens was called the Games of the XXVIII Olympiad.

Friday, April 17, 2009

Make a Battery from Potato

Make a Battery from Potato
Introduction:
Batteries generate electricity through a chemical reaction between two different electrodes and one electrolyte. Use of Copper and Zinc electrodes and Sulfuric acid as electrolyte is a proven method for this process. We are wondering if we can use any other liquid as electrolyte? This gave us the idea of using a potato as electrolyte. After all a fresh potato has a lot of juice that may serve our purpose as electrolyte.
Problem:
Can Potato be used to generate electricity?
Hypothesis:
Potato juice contains many water soluble chemicals that may cause a chemical reaction with one or both of our electrodes. So we may get some electricity from that.

Material:
For this experiment we use:
A fresh potato
Copper Electrode
Zinc Electrode
A Digital or Analog Multimeter to measure Voltage or Current of produced electricity.
Alligator clips/ Leads

Procedure:
We insert copper and zinc electrodes in to the potato, close but not touching each other. We use Clip leads to connect our electrodes to the Multimeter to measure voltage between two electrodes or current passing through the multimeter. For this experiment we removed the shell of a broken AA battery for our Zinc electrode. (Make sure to test your multimeter by connecting it's Positive and Negative wires to each other that should show no current and no voltage).


A digital multimeter showed 1.2 volts between the electrodes, but the analog multimeter showed a much smaller value. In other words even though the voltage between electrodes is 1.2 Volts, the speed of production of electricity is not high enough for an analog multimeter to show the exact voltage. (Analog multimeter gets it's power from our potato to show the voltage, but digital Multimeter gets it's power from an internal battery and does not consume any of the electricity produced by our potato, that is why it shows a larger and more accurate value).We repeated this experiment with some other fruits and all resulted almost the same. In all cases the produced voltage is between 1 and 1.5 volts, and in all cases they do not produce enough current to turn on a small light.
Another thing that we learned from this experiment is that creating electricity and making a battery is easy, the main challenge is producing a battery that can continue to produce larger amount of electricity for larger amount of time.