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Updated: May 21, 2025
Constructors have racked their brains over the subject of turrets in the old contest between gun-power and protection. Too much gun- power, too little armour! Too much armour, too little gun-power! Finally, results depend on how good is your armour, how sound your machinery which rotates the turret. That shell did not go through bodily, only a fragment, which killed one man and wounded another.
The earth revolves about the sun once every year, and rotates on its axis once in twenty-four hours, which makes what we call a day. Rotate means to move round a centre; thus the daily turning of the earth on its axis is a rotation. Its annual course round the sun is called a revolution.
The moon in its monthly revolution around the earth follows also the same direction, and our satellite rotates on its axis in the same period as its monthly revolution, but in doing so is again observing this same law.
In the next following section of the orbit the planet rotates through another right angle, but, owing to increased distance from the sun, the motion in the orbit now becomes slower until, when the planet arrives at aphelion, C, the angular difference disappears and the cross is once more just under the sun.
The earth's axis rotates about the pole of the ecliptic, making one revolution and a twenty-six thousandth part of a revolution in the sidereal year, in the opposite direction to its orbital motion.
Sinking under, a hundred tons of water drive the body to the bottom; there it rotates, it rises, it is forced down again, a hundred tons of water beat upon it; the foot, perhaps, catches among stones or woodwork, and what was once a living being is imprisoned in death. Enough of this. I unloosed the boathook, and drifted down with the stream, anxious to get away from the horrible weir.
'I suppose, said Felix quaintly, 'the world would rather miss its axis, and yet that does not move. 'Yes, it does, said Cherry, 'it wobbles. I suppose Wilmet says rotates, just about as much as I am going to do now I have got back into my own dear sphere again. 'Devouring flames resistless glow, And blazing rafters downward go, And never halloo, "Heads below!"
A handle is attached to the lower roller at the end opposite the gears, and as it is turned, it rotates the cylinders in opposite directions. A piece of cotton is pressed between the rollers, which seize the fibres and carry them through, while the seeds are forced back and fall to the ground.
From a rediscussion of these somewhat doubtful observations Bessel inferred that Mercury rotates on an axis inclined 70° to the plane of its orbit in 24 hours 53 seconds. The rounded appearance of the southern horn seen by Schröter was more or less doubtfully caught by Noble , Burton, and Franks ; but was obvious to Mr. W. F. Denning at Bristol on the morning of November 5, 1882.
Secondly, the theory that Venus rotates but once in the course of a revolution finds but slight support from the doctrine of tidal friction, as compared with that which it receives when applied to Mercury.
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