Why do we have two sets of teeth?

Why do we have two sets of teeth?

The reason you have two sets of teeth probably comes down to size. A full set of permanent teeth would be too big to fit into a young child’s mouth. So milk teeth act as a bridge until the jaw is large enough to accommodate a full set of permanent teeth. The last teeth that emerge are your wisdom teeth.

What is a palindrome?

A palindrome is a sentence or group of sentences that reads the same backwards as it does forward: Ex:  ‘Red rum, sir, is murder.’ ‘Ma is as selfless as I am.’ ‘Nurse, I spy gypsies. Run!’  ‘A man, a plan, a canal – Panama.’ ‘He lived as a devil, eh?

What determines the pitch of the sound?

Since pitch is such a close proxy for frequency, it is almost entirely determined by how quickly the sound wave is making the air vibrate and has almost nothing to do with the intensity, or amplitude, of the wave.

What NFL team won back to back Super Bowls twice?

While several teams have made back to back Super Bowl appearances, only the Pittsburgh Steelers have managed to win back to back Super Bowls twice in 1974, 1975 and 1978, 1979.

How many electoral votes must a candidate win in order to win the presidency?

In order to become president, a candidate must win more than half of the votes in the Electoral College (currently that would be 270 of the 538 total electors).

Why is there a leap year every 4th year?

A common year has 365 days and a leap year 366 days, with the extra, or intercalary, day designated as February 29. A leap year occurs every four years to help synchronize the calendar year with the solar year, or the length of time it takes the earth to complete its orbit about the sun, which is about 365¼ days.

How fast is the speed of light in miles per hour?

The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

What is the most recycled material in the United States?

99% of all asphalt is recycled and used to fix and build roads over and over again. A variety of recycled materials are in that pavement – recycled roof shingles, ground rubber from tires, glass, foundry sand, slag and even pig manure, says the Nation Asphalt Pavement Association.