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Test # 97


1.
Which fruit contains more vitamin C?

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Idiom of the Day

fizzle out
to fail after a good start, to end in failure
The party began to fizzle out at midnight after many people went home.
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  • Simple Science

    Measurement of Work

    Man's Way of Helping Himself:
    In Section 150, we learned that the amount of work done depends upon the force exerted, and the distance covered, or that W = force distance. A man who raises 5 pounds a height of 5 feet does far more work than a man who raises 5 ounces a height of 5 inches, but the product of force by distance is 25 in each case. There is difficulty because we have not selected an arbitrary unit of work. The unit of work chosen and in use in practical affairs is the foot pound, and is defined as the work done when a force of 1 pound acts through a distance of 1 foot. A man who moves 8 pounds through 6 feet does 48 foot pounds of work, while a man who moves 8 ounces (1/2 pound) through 6 inches (1/2 foot) does only one fourth of a foot pound of work.


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