First Principles of Natural Philosophy a Text book for Common Schools
The book First Principles of Natural Philosophy a Text book for Common Schools was written by author Elroy Mckendree Avery Here you can read free online of First Principles of Natural Philosophy a Text book for Common Schools book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is First Principles of Natural Philosophy a Text book for Common Schools a good or bad book?
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\ Precedes Attr*cti# POLBS. Compass. Dipping. DECLINATION. DIP. MAGNETIC NEEDLES. L RELATION TO ENERGI NATURAL PHILOSOPffT. 302 EXERCISES. t State the first law of magnets and tell why you believe it ia be true. 2. When you break a bar magnet have you two parts of a magnet? 8. What is meant by retentivity ? What other name has the same thing ? 4. Give good reasons for believing that the earth is a magnet 5. Mention three magnetic substances. 6. How can you obtain a magnet with a single pole ? 7.... A dozen steel sewing-needles are hung in a bunch by threads passed through their eyes. How will they behave when hung over the pole of a strong magnet ? 8. Devise an experiment to show how to cut off the influence of a magnet from a piece of iron that is not far distant. 9. If one should carry a dipping needle from the north magnetv- 1 pole of the earth to the south magnetic pole, how would the needle change its position during the journey ? 10. How can I magnetize an iron bar without using a current of electricity or a steel or iron magnet ?
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