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He and Loring practiced incessantly for days at the controls, darting here and there, putting on terrific acceleration until the indicators showed a velocity of hundreds of thousand of miles per second, then reversing the acceleration until the velocity was zero. They studied the controls and alarm system until each knew perfectly every instrument, every tiny light, and the tone of each bell.
He had arrived at the top of his speed and at the middle of the staircase, when his course was arrested by the lady whom he sought, who came, with a velocity equal to his own, in an opposite direction. The consequence was a concussion between the two meeting masses, by which Mrs.
There is, moreover, in all vessels passing through the water with any considerable velocity, a current of water following the vessel, in which current, in the case of a screw vessel, the screw will revolve; and in certain cases the phenomenon of negative slip may be imputable in part to the existence of this current.
The velocity, and indeed violence, with which Waverley was hurried along nearly deprived him of sensation; for the injury he had received from his fall prevented him from aiding himself so effectually as he might otherwise have done.
For some hundreds of miles "the crookedest of great rivers," it varies frequently in width and velocity and is full of shoals; then for hundreds more, though uniform in width, it often rises higher than its shores, and is confined in artificial levees, which it continually breaks down.
Among other theories and ideas, Ptolemy taught that the earth is the center of the universe, that revolving about it are the moon, Mercury, Venus, the sun, the other planets, and the fixed stars, and that the entire machine is turned with incredible velocity completely around every twenty-four hours.
With this enormous charge, the heavy shell will be capable of an initial velocity of 2,100 feet and of piercing, on its exit from the chamber, either a hammered iron plate 4 feet in thickness or two united plates 2 and 2.88 feet in thickness.
In this way, it wouldn't have them. Their equivalent in mass would have been used to gain velocity. And when the Platform finally rode in space, it would have expended every ounce of the driving apparatus used to get it there. Now the rocket tubes were being lined and loaded. The time to take-off was growing short indeed. Joe watched a while and turned away.
Mathematically, the resistance increases in the ratio of the square of the velocity; and although the air is of course more easily displaced than water, the same rule applies to it, and the flight of a ball is so inconceivably rapid that the resistance becomes enormous.
His elements are taken from Tuckey, who found off the "Diamond Rock" a velocity of 3.50 knots an hour, and from Vidal's Chart, showing 9,000 English feet or 1.50 nautical miles in a Thalweg fifty fathoms deep. Thus he assumes only two nautical miles for the current, or sixty inches per second, which must be considerably increased, and an average depth of ten fathoms, which again is too little.
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