YES, YOU CAN MAKE A DIFFERENCE
In a gun factory in the United States, an unusual experiment was conducted. A bottle cork, weighing less than four grams, was suspended by an almost invisible silk thread alongside a very heavy steel bar, itself hung vertically from a beam by a slender metal chain. The cork, set in motion, began to swing gently against the steel bar. For a long time there was nothing to be seen but its rhythmic, noiseless swaying back and forth, back and forth, while the bar remained motionless. More minutes went by . . . two . . . five . . . ten . . . a half hour. Then suddenly under the relentless barrage, and so nearly imperceptibly as to seem almost an illusion, the steel bar was seen to tremble. A few moments later it shuddered as if seized with a nervous tremor, hung quiet again, then shuddered again. There was no deviation in the motion of the…
To view this resource, log in or sign up for a subscription plan
We are sorry that this resource was not useful for you!
Help us improve this resource!
Tell us how we can improve this content?