| 41. | The two stars are separated by 0.6 arcseconds and complete one orbit around their common centre of mass once every 640 years.
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| 42. | For ERD the scattering angle in the lab frame of reference is quite different from that in the centre of mass frame of reference.
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| 43. | Its steep northern and southern slopes would allow the experiment to be sited close to its centre of mass, maximising the deflection effect.
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| 44. | In Newton Euler equations, " translational acceleration " is used to mean the instantaneous acceleration of the centre of mass of a body.
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| 45. | To lower the stabilizers can be added which bring the centre of drag further back, well behind the centre of mass at all times.
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| 46. | A and B are separated by four arcseconds on the sky, and perform one orbit around their centre of mass once every 3200 years.
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| 47. | It is placed under the centre of mass of the piano and allows it to be turned on its axis to manoeuvre round a building.
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| 48. | There are actually two high tides, because the earth and moon, as a system, both rotate about a common centre of mass.
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| 49. | :Yes, but the Earth is so much larger than the Moon that the centre of mass of the two is inside the Earth.
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| 50. | :: : Cycling is much more efficient because the centre of mass doesn't move up and down as it does with walking.
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