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How Does a Tuning-fork Work?
A tuning-fork vibrates to give a musical note of definite pitch or frequency and is marked on the fork by a letter or symbol…
What Is Tarmac?
Tarmac is a hard black material used for roads, parade grounds or anywhere that a hard, even and durable surface is needed. It is…
When Was the First Lighthouse Built?
The first known lighthouse was the Pharos of Alexandria in Egypt, a 400-foot tower built about 280 B.C. A wood fire was kept burning…
Why Do Myotonic Goats Faint?
Not all goats faint. Those that do exhibit fainting behavior are members of a special breed that goes by a variety&
Why Do Some Acids Cause Burns?
Some acids burn because they have a strong tendency to absorb water, giving out a great deal of heat in the process. Since most…