The heat that drives the eruptions is thought to come from " tidal friction " _ the constant stretching and squeezing of the moon by Jupiter's gravity.
12.
But almost all are not, allowing the transfer of a very small amount of momenta from axial rotations to orbital revolutions due to tidal friction and to bodies being non-spherical.
13.
:I wonder ( without much evidence ) whether tidal friction due to the moon and friction due to coriolis effects in the spinning liquid core have a measurable effect too.
14.
The Moon is not a perfect sphere, tidal friction slowed it's rotation, and it settled in a position in which the bulges are aligned toward / away from the Earth.
15.
One most commonly cited involves the gravitational force of the moon, which drives the ocean tides and creates " tidal friction " that acts like a brake on the Earth's spin.
16.
:: Not to lose sight of the elephant in the room, tidal friction dwarfs all other effects, so that in the long term the earth's rate of rotation always slows down.
17.
Also, as the Earth's day length gets close to the Moon's orbital period, the raised tides will stay in a similar position on the Earth, so tidal friction will be much reduced.
18.
The newly formed Moon orbited at about one-tenth the distance that it does today, and spiraled outward because of tidal friction transferring angular momentum from the rotations of both bodies to the Moon's orbital motion.
19.
As mentioned, the idea of the nebular hypothesis had been outlined by Immanuel Kant in 1755, and he had also suggested " meteoric aggregations " and tidal friction as causes affecting the formation of the Solar System.
20.
After retiring from the law, Heath wrote papers on " Secular Local Changes in the Sea Level " and the " Dynamical Theory of Deep Sea Tides and the Effects of Tidal Friction " ( " Philosophical Magazine"
