If the illumination from a source of light varies inversely as the square of the distance, how much farther from a candle must a book, which is now 15 inches off, be removed, so as to receive just one-third as much light ? 20. University Algebra - Page 269by Webster Wells - 1879 - 444 pagesFull view - About this book
| James Wood - 1857 - 634 pages
...whose diameter is 8 in. ? (11) Given that the illumination from a source of light varies inverse/i/ as the square of the distance, how much farther from a candle must a book, which is now 8 inches off, be removed, so as to receive just half as much light? (12) Given that the content of... | |
| Benjamin Greenleaf - Algebra - 1864 - 420 pages
...its diameter, having given that the area of a circle varies as the square of fts diameter. Ans. 10. 8. Given that the illumination from a source of light varies inversely as the square of the distance ; how much farther from a candle must a book, which is now 3 inches off, be removed, so as... | |
| John William Colenso (bp. of Natal.) - 1878 - 298 pages
...1о.гч-(8.г — Ц) ; -0>0^71 - -11 ; whence 448.1 --200.Г = -33; &c. — l71 .I' -- 1 Ю.Г — о 12. Given that the illumination from a source of light varies inversely as the square of the distance; how much farther from a candle must a speck which is now 8 inches oft' be removed, so as... | |
| C R. Lupton - 1879 - 194 pages
...to A than to B. Find how much later the second started than the iirst. (6) Solve the equations (7) Given that the illumination from a source of light varies inversely as the square of the distance ; how much farther from a candle must a speck which is now 8 inches off be removed, so as... | |
| George Albert Wentworth - Algebra - 1884 - 166 pages
...room. Compare the intensities of light at the fourth corner and at the centre of the room, assuming that the illumination from a source of light varies inversely as the square of its distance. 9. Show how to insert any number of harmonic means between two given quantities. If 2p... | |
| George Albert Wentworth - 1889 - 406 pages
...room. Compare the intensities of light at the fourth corner and at the centre of the room, assuming that the illumination from a source of light varies inversely as the square of its distance. 9. Show how to insert any number of harmonic means between two given quantities. If 2p... | |
| Webster Wells - Algebra - 1889 - 584 pages
...equivalent to the sum of two pyramids whose bases are 5 and 8, and altitudes 12 and 6, respectively? 12. If the illumination from a source of light varies inversely as the square of the distance, how much farther from a candle must a book, which is now 3 inches off, be removed so as to... | |
| Webster Wells - Algebra - 1890 - 560 pages
...are 5 and 12, and radii 6 and 9, respectively ? 19. If the illumination from a source of light varies inversely as the square of the distance, how much farther from a candle must a book, which is now 15 inches off, be removed, so as to receive just one-third as much light ? XXVII. ARITHMETICAL PROGRESSION.... | |
| Webster Wells - Algebra - 1890 - 604 pages
...to the sum of two cylinders whose altitudes are 5 and 12, and radii 6 and 9, respectively ? 19. If the illumination from a source of light varies inversely as the square of the distance, how much farther from a candle must a book, which is now 15 inches off, be removed, so as... | |
| Webster Wells - Algebra - 1897 - 422 pages
...equivalent to the sum of two cylinders whose altitudes are 5 and 7, and radii 6 and 3, respectively ? 19. If the illumination from a source of light varies inversely as the square of the distance, how much farther from a candle must a book, which is now 15 inches off, be removed, so as... | |
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