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gnoring second-order effects such as thermal winds, the source of kinetic energy is the rotational energy of the planet, so it must eventually stop spinning.
so it must eventually stop spinning.
Quote from: alancalverd on 01/08/2020 11:28:25 so it must eventually stop spinning.Just as soon as it gets hold of something to which it can impart angular momentum.Tricky for something in a near vacuum.Might need to wait until the Sun goes red giant.
Quote from: alancalverd on 01/08/2020 11:28:25gnoring second-order effects such as thermal winds, the source of kinetic energy is the rotational energy of the planet, so it must eventually stop spinning.And there was me thinking that the Sun powered the wind.
If you take the energy out of the wind in an eastward direction the waves will not be generated in that direction and trees will not blow thus meaning the earth is slowed more by the windmill but less by the environment.
OKThe spinning Earth has enormous rotational KE.But it can't transfer that energy without slowing itself down.And it can't slow itself down without an external torque.Now, the geothermal energy, and the tides might make small contributions but they really don''t do "weather".So, the fundamental question for you to answer Alan, is this.Are you abandoning the conservation of energy, or abandoning the conservation of angular momentum?
but if they are in contact with the ground (a very large mass) you can generally bring the vehicle to a standstill.
So, rather than making silly comments about my (non existent) driving, perhaps you can tell us what provides the torque that slows the Earth?(Hint; it's not atmospheric drag; there isn't a 1000 MPH wind running round the equator)
(Hint; it's not atmospheric drag; there isn't a 1000 MPH wind running round the equator)
Now who's being silly?
perhaps you can tell us what provides the torque that slows the Earth?
Now if we take a sample of equatorial air and adiabatically move it
Well, since you are sticking with your idea that the wind can slow down the rotation of the Earth in the long run... you.
Quote from: Bored chemist on 03/08/2020 14:55:27Well, since you are sticking with your idea that the wind can slow down the rotation of the Earth in the long run... you.Please don't ascribe irrelevant ideas to me.
If we extract kinetic energy from the geostrophic wind and dissipate it as heat, whence came that energy? The only source is the spin of the earth.
, but does that change the angular momentum?
Now, for the 3rd or 4th timeQuote from: Bored chemist on 02/08/2020 12:13:33perhaps you can tell us what provides the torque that slows the Earth?Hint: it can't be the atmosphere because that's rotating along with,and is part of, the Earth. If it wasn't then there would be a 1000 mph wind round the equator.