A prefix is a word part added to the  beginning of a word to create a new word with a different  meaning.    Examples: refill, undo,  incomplete, precooked   â¦  (Letters added to the end of a root or word are a suffix.). + 213 others found this useful. Caroline Russell.
Its not uncommon to have above 90% relative humidity readings. I find it uncomfortable once the humidity is over 70%, but I'm really not a 'good' test subject as I have lived in Florida all my life and have gotten use to high humidities. I can tell you one thing with certainity, the insects love the high readings! 60% is a threshold in the summer.
Brittleness can occur at humidity levels as low as 40 percent, while mildew grows at levels over 50 percent RH. The range recommended by experts is between 30 and 50 percent RH, and temperatures no higher than 70 degrees Fahrenheit.Image: Flickr-Andrew Ratto-Mildew on Walls. Similarly to books, electronics are sensitive to extremes of humidity.ondensation becomes a very real problem at high humidity. Very low humidity, on the other hand, can cause the components of a device to become brittle. Electronics are usually designed for operation in normally-experienced humidity ranges, and so will operate correctly in the healthy human range of 30 to 50 percent.