We could use this, by adding power, to fine tune the day to eliminate leap years...;)
Interesting. Yes could we put power into a similar system and accelerate the rotation?
Can Earth's rotation generate power? Physicists divided over controversial claim
121–130 of 231 posts
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#122Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#123Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#124Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#125The Earths rotation already generates power for us: wind. It’s why the jet stream only goes one direction.
Isn't that more of the sun+rotation?
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#126I have no idea on the claims here, but there is one method for extracting work from the magnetic field that I very much enjoy.
A magnetorquer is an attitude control system on a satellite that runs on electricity. Run the electricity through an electromagnet. The magnet couples to Earth's magnetic field and turns the satellite, like a compass needle.
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#127Wouldn't this eventually slow down Earth's rotation? The rotational kinetic energy of our planet is 1/5 M * R^2 * w^2 with (approximately) M = 6e34 kg, R = 6.3e6m, w = 7.4e-5 rad/s, which gives approximately 5e36 joules. Yearly we need roughly 3e16 Wh. Yeah ok there's plenty. Woah! (also, I may be off by some orders of magnitude)
This is addressed in the last paragraph of the article: > Even if it works, the method will not generate energy from thin air. It would tap Earth’s kinetic energy and, in doing so, cause the planet’s spinning to slow over time — although only slightly. If the technique provided all of Earth’s electricity needs, which was around 11 trillion watts in 2022, this would slow the planet’s spin by 7 milliseconds over the ne…
How much velocity loss would be needed for an impact on the environment, or on some humans someplace?
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#128I wonder how many wats of power we would be able to generate before earth slows down for i.e. 1 second longer day.
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#129Wouldn't this slowly slow the earths rotation down? Let's say everyone tried to build power plants using this.
Re: Can Earth's rotation generate power? Physicists divided over controversial claim
#130Wouldn't this eventually slow down Earth's rotation? The rotational kinetic energy of our planet is 1/5 M * R^2 * w^2 with (approximately) M = 6e34 kg, R = 6.3e6m, w = 7.4e-5 rad/s, which gives approximately 5e36 joules. Yearly we need roughly 3e16 Wh. Yeah ok there's plenty. Woah! (also, I may be off by some orders of magnitude)
Can we put energy in to speed it up?
That way a day can be 24 hours exactly instead of 23 hours, 56 minutes, 4 seconds, etc...