Motors typically run at ___________________ _, ___________________ _, or ___________________ _ rpm.
Motors larger than ___________________ _ horsepower run more efficiently and cause less voltage drop problems when operating with ___________________ _ volts.
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There are 20 feet of blood vessels in each square inch of human skin.
The average adult has about 21 square feet of skin.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
The human body produces and destroys 15 million blood cells every second.
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