tide-generating force

noun

the difference between the force of gravity exerted by the moon or the sun on a particle of water in the ocean and that exerted on an equal mass of matter at the centre of the earth. The lunar tide-generating forces are about 2.2 times greater than are the solar ones See also neap tide spring tide tide 1

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He suggests with some hesitation that this may have been due to one of Pettersson's periods of maximum "tide-generating force."

Yet neither will even this be the final stage; for the system is disturbed by the tide-generating force of the sun.

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