The New Physics. a Manual of Experimental Study for High Schools And Preparatory Schools for College
The book The New Physics. a Manual of Experimental Study for High Schools And Preparatory Schools for College was written by author John Trowbridge Here you can read free online of The New Physics. a Manual of Experimental Study for High Schools And Preparatory Schools for College book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The New Physics. a Manual of Experimental Study for High Schools And Preparatory Schools for College a good or bad book?
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It will be seen that 100 feet, or even 1,000 feet, is very MEASUREMENT OF MAGNETIC FORCE. 147 small compared with a distance of 21,120,000 feet. The other manifestations of forces of attraction which we commonly see are due to electricity. Experiment 87. — Hang up by a fine silk fiber a pith-ball, and, having rubbed a piece of sealing-wax upon the coat-sleeve, present it to the pith-ball : it is immediately attracted to the wax, and after re- ceiving a charge from the wax it is quickly re- pell...ed. We find by experience that bodies charged by what is called the same kind of electricity — ^that is, two pith-balls electrified in the same manner by a piece of sealing-wax — will repel each other. We also know that we can induce an opposite charge on a non-electrified body by bringing it near an electrified body, for the non-electrified body will be attracted to the charged body. The body A (Fig. 71) charged with positive electricity will attract a negative charge to the end d, and repel a posi- tive charge to the end c of a neighboring conductor c d.
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