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Updated: May 21, 2025
But the tidal effects of a satellite circulating quicker than its primary rotates exactly reverse those of one moving, like our moon, comparatively slowly, so that the tides raised by Phobos tend to shorten both periods.
The boom of the drilling rig as it raises and drops the drill provides the necessary impact. With the core method, as its name implies, a hollow boring drill cuts its way aided by steel shot and a flow of water forced through the pipe that rotates the cutting tool. With either method the results are the same.
Not only does the mighty ocean obey this wonderful influence in the ebb and flow of its tides, but the Earth, as she rotates upon her axis, obeys this mighty power and manifests in her depths and heights in her serpentine movement about the Sun. Nature's laws are very exact and man, to become the Arbiter of his own destiny, must blend his energies in harmony with those of Nature.
These conclusions inspired, it is true, much distrust, consequently there were no received ideas on the subject to be subverted. Nevertheless, a shock of surprise was felt at Schiaparelli's announcement, early in 1890, that Venus most probably rotates after the fashion just previously ascribed to Mercury.
Are there any phenomena which imply that rotation is going on in an electric conductor? There are. An electric arc, which is a current in the air, and is, therefore, less constrained than it is in a conductor, rotates.
That is not to imply any direct proportion between the amount of thyroid secretion in an individual, and the length of life to which he is destined. When the reactions go faster, more oxygen and food material are burned up or oxidized, more energy is liberated, the metabolic wheel rotates more quickly, the individual senses, feels, thinks and acts more quickly.
We cannot see how it rotates, but if, as we said just now, it turns the same face always to Saturn, then of course it rotates the wrong way too.
It should also be added that in 1900 spectroscopic observations by Belopolski at Pulkova gave evidence that Venus really rotates rapidly on her axis, in a period probably approximating to the twenty-four hours of the earth's rotation, thus corroborating the older conclusions.
Jupiter rotates much quicker than the earth that is to say, he turns round more quickly but he actually gets over the ground more slowly. The sun appears much smaller to him than it does to us, and he receives considerably less light and heat.
It is scarcely necessary to inform the reader why it is that we never see but one face; still, for the sake of those who have not thought out the subject I may state that it is because the moon rotates on her axis exactly in the time that she performs a revolution round the earth.
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