Will Earth's magnetic reversal cause catastrophe? (Part 2 of 'Did the CIA classify...?)
Part one of this video is here:
• Did the CIA classify a "global catast...
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CORRECTIONS:
1) 13:01 – I said ‘kilometers an hour’ instead of ‘miles an hour.’
2) As expected, someone corrected my understanding of the torque required to stop the Earth's rotation. The formulaa I used is for a uniform sphere, whereas the Earth has a much denser center and a lighter crust. So the torque would be slightly less than I calculated. But in non-scientific terms, still a shitload.
3) Another poster wrote: "The unit of torque is Nm [Newton-meter] not Nm/s."
4) @anttibra, a physics teacher from Finland, corrected my calculation. On the basis that he knows better then me, I'm happy to lay it out here. He wrote:
Torque is calculated by this equation: M=F x r, where x is vector product. If force is plumb compared to distance of rotating axis, then you can use simple multiplication.
Angular momentum is L=J*w, where J=moment of inertia (similar to mass in rotation) and w=angular velocity.
Assuming Earth is uniform sphere (it's not, but this is simplified math), then J=2/5*Mr^2=9,721052869650016e37 kgm^2
Since Earth rotate once every 23h 56min 4,10 seconds, then angular velocity w=2*pi/(86164,1 s)=7,292*10^-5 1/s.
Now we get Earth's angular momentum L=7,08870359707824214497e33 kgm^2/s.
When we want to stop the Earth, we must apply torque over time.
delta L=M*delta t, delta t = time we apply torque. If the Earth stops in 10 hours, then delta t= 36000 seconds.
M=L/t=7,08870359707824214497e33 kgm^2/s / (36000 s) = 1,96908433252173392916e29 Nm.
How much is this? Well, if we apply force on the equator, the required force would be:
M=F*r
F = M/r = 1,96908433252173392916e29 Nm / (6 378 140 m) = 3,08723912068680513309e22 = 31e21 N = 31 ZN = 31 000 000 000 000 000 000 000 N.
Another poster added: "You have this line as part of your corrections: 'Since Earth rotate once every 23h 56min 4,10 seconds, then angular velocity w=2*pi/(86164,1 s)=7,292*10^-5 1/s.' The units are in radians per second, but the unit written have been written as rotations per second (Hz or 1/s).
SOURCES:
Earth Catastrophe Cycle | Pole Shift
Suspicious0bservers
• Earth Catastrophe Cycle | Pole Shift
An overview of Earth’s magnetic field
https://geomag.bgs.ac.uk/education/ea...
Strength of field falling:
https://www.ontariobeneathourfeet.com...
Magnetic field over 9,000 years:
https://www.universetoday.com/156234/...
Equations of inertia;
https://www.physicsforums.com/threads....
https://physics.stackexchange.com/que...
https://www.universetoday.com/156234/...
Recurrent ancient geomagnetic field anomalies shed light onfuture evolution of the South Atlantic Anomaly https://www.pnas.org/doi/epdf/10.1073...
The Earth’s magnetic field – an overview
https://geomag.bgs.ac.uk/education/ea...
https://www.ontariobeneathourfeet.com...
How Does A Magnetic Reversal Affect Life On Earth?
RapidChangesinStrengthandDirectionofEarth'sMagneticFieldOverthePast100,000Years
https://agupubs.onlinelibrary.wiley.c...
