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Author Question: Water softeners remove all of the following ions EXCEPT A) Ca2+. B) Fe2+. C) Mg2+. D) ... (Read 19 times) |
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).
There are 60,000 miles of blood vessels in every adult human.
Everyone has one nostril that is larger than the other.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.