The Planet Earth: An Astronomical Introduction to GeographyMacmillan, 1894 - Всего страниц: 108 |
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Стр. 53
... ball of lead and a ball of cork , and placing them in this infinite ocean . The balls would remain for a time at the points in which they were placed , for , like other inanimate objects , they are quite unable to set themselves in ...
... ball of lead and a ball of cork , and placing them in this infinite ocean . The balls would remain for a time at the points in which they were placed , for , like other inanimate objects , they are quite unable to set themselves in ...
Стр. 55
... lead ball is brought near it and attracts it . The change of position thus produced is measured , and also the distance separating the centre of the two balls . From the former the force of attraction exerted by the lead ball is ...
... lead ball is brought near it and attracts it . The change of position thus produced is measured , and also the distance separating the centre of the two balls . From the former the force of attraction exerted by the lead ball is ...
Стр. 56
... lead ball is as large as the earth and then make comparison . When this has been done , it will found that the imaginary ball of lead would h about twice the pulling power of the earth . Henc ball of lead as large as the earth has a ...
... lead ball is as large as the earth and then make comparison . When this has been done , it will found that the imaginary ball of lead would h about twice the pulling power of the earth . Henc ball of lead as large as the earth has a ...
Стр. 57
... lead ball of known mass and size is compared with the pull of the earth . The latter is calculated to pull with half the force of a lead ball of the same size , and its mass is , therefore , half what it would be if composed of lead ...
... lead ball of known mass and size is compared with the pull of the earth . The latter is calculated to pull with half the force of a lead ball of the same size , and its mass is , therefore , half what it would be if composed of lead ...
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The Planet Earth: An Astronomical Introduction to Geography Sir Richard Gregory Полный просмотр - 1894 |
The Planet Earth: An Astronomical Introduction to Geography Sir Richard Gregory Полный просмотр - 1894 |
The Planet Earth: An Astronomical Introduction to Geography Sir Richard Gregory Полный просмотр - 1894 |
Часто встречающиеся слова и выражения
Aldebaran Algol altitude Andromeda angle angular distance apparent motion apparent path Arcturus astronomers attraction Betelgeuse bright star Cassiopeia celestial equator celestial pole celestial sphere centre circle circumference completely round constellation Copernican theory Denebola described diameter direction distance round diurnal motion earth east eastern horizon ecliptic ellipse equal fact fixed Foucault's pendulum globe gravitation Heaven Heaven Heaven hence inferior planets journey Jupiter lamp latitude lead ball length light loops luminary Mars mass measure meridian miles minutes moon movement moving round night noonday north and south north celestial pole object observed occupies opposite orbits Orion passes pendulum planet moves Pole-Star position precession Procyon Regulus revolution revolve round rising and setting round the sun Saturn seen side south at midnight spinning spring equinox stationary point summer solstice sun's suppose surface swing telescope tion triangle twilight visible watch zodiac