1. When Washingtonâs father Augustine died in 1743, George Washington became a slave owner at the early age of eleven. In his will, Augustine left his son the 280 acre family farm near Fredericksburg, Virginia. In addition, Washington was willed ten slaves.
On the decibel scale, the smallest audible sound (near total silence) is 0 dB. A sound 10 times more powerful is 10 dB. A sound 100 times more powerful than near total silence is 20 dB. A sound 1,000 times more powerful than near total silence is 30 dB.
Intensity, or loudness, is measured in decibels (dB). A person with hearing within the normal range with respect to loudness of sound can hear sounds ranging from 0 to 140 dB. A whisper is around 30 dB. Conversations are usually 50 to 60 dB. Sounds that are louder than 90 dB can be uncomfortable to hear.