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Author Question: A 10-kg block on a horizontal frictionless surface is attached to a light spring (force constant = ... (Read 648 times) |
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
A recent study has found that following a diet rich in berries may slow down the aging process of the brain. This diet apparently helps to keep dopamine levels much higher than are seen in normal individuals who do not eat berries as a regular part of their diet as they enter their later years.
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.