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 referring to it
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Pressure
Why Do Water Pipes Sometimes Burst in Winter?
Cold water pipes may burst in winter when the outside temperature falls below 0°C (32 °F) and the water turns to ice. The pipe’s wa
What Is a Meteorite?
What Is a Meteorite? Meteorites begin as bodies of matter traveling at great speed through space. In the solar system there are numberless s
When Do Bones Break?
When Do Bones Break? Bones break under varying degrees of pressure according to age, health and other circumstances. They are made of hard,
Why Do We Have Kidneys?
Why Do We Have Kidneys? Our kidneys perform four functions, of which the most obvious is the ejection of waste materials containing nitrogen