It was known what type of centrifuges were being used: even to the extent of which industrial micro-controller was used to set them spinning and at what speed.

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The Moon's steady gravitational influence keeps the Earth spinning at the right speed and angle to provide the sort of stability necessary for the long and successful development of life.

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" Even the barren Moon is essential: "Without the Moon's steadying influence, the Earth would wobble like a dying top.... The Moon's steady gravitational influence keeps the Earth spinning at the right speed and angle to provide the sort of stability necessary for the long and successful development of life.

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Once the container is spinning at the correct speed (typically a few revolutions per minute), the mercury spreads out to form a layer less than a millimetre thick, and in such a way that variations in the thickness of the mercury layer compensate for the imperfect shape of the container.

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Then we have France, a sexy-looking motorbike with oodles of speed and zip which gets sent spinning into the tyre wall by its heavyweight rivals.

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Once the light enters the ruby, its speed is slowed down to around the speed of sound (approximately 741mph) and the spinning motion of the rod drags the light with it, resulting in the image being rotated by almost five degrees: large enough to see with the naked eye.

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