# One possible explanation of the dramatic changes of the Earth.

Discussion in 'Earth Science' started by Emil, Aug 16, 2010.

1. ### EmilValued Senior Member

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One possible explanation of the dramatic changes of the Earth.

Assumption that the earth rotation speed decreases is a reasonable assumption.Especially as we are talking about a very long time period, billions of years.In terms of evolutionary time it was sufficient that the first forms of unicellular life to grow to flora and fauna of our time.

I have calculated for different speeds of rotation of the Earth,the resultant acceleration between gravitational and centrifugal acceleration at the Equator.
Earth's radius varies between R = 6357 km and R = 6378 Km
I have approximated the gravitational acceleration g=10m/s2
Earth's angular velocity omega = 72,6x10-6 rad/s
Earth's surface velocity V = 463 m / s
Centrifugal force f=V2/R=omega2R
Resultant acceleration at the equator g' [m/s2]=g [m/s2]-f [m/s2]
To have 90% of the our "weight" Earth should spin 5.4 times faster, meaning one day to take 4 hours and 24 minutes instead of 24 hours
90% - 5.4(4h,24min)
80% - 7.7(3h,6min)
70%- 9.4(2h,36min)
60%-10.9(2h,12min)
50%-12.2(2h,00min)
40%-13.4(1h,48min)
30%-14.4(1h,42min)
20%-15.4(1h,36min)
10%-16.4(1h30min)
00%-17.2(1h,24min)
This applies only to the Equator.Centrifugal force is zero at the poles.
Also, I found the constant earth radius, that is not correct because it grows because Earth is not solid.

Question is how earth would look at different rotation speeds?
How water and plate tectonics migrates?
Earth's surface must be perpendicular to the resultant acceleration of gravitational acceleration and centrifugal acceleration.
Gradually reducing the Earth's rotational speed is rasponsabil of separation the continents and their migration?
It is also responsible for "lifting" and "descent" land of the ocean?
Maybe not earth sank and rose but the water was changed how settlement on Earth?
This "lightweight" because of centrifugal force,is due the appearance of large animals (dinosaurs)?

If the Earth's collision with a Near-Earth Object has changed Earth's rotation speed?
May be responsible for the extinction of the dinosaurs?
Sudden change of Earth rotation, can cause major disasters.
Because the Moon we have a movement of water but the effect of changing the Earth's rotation speed can be much higher.
Also moving tectonic plates cause volcanic eruptions. (Pollutione)

If anyone understands what I wanted to say and knows how to explain better(My English is not good) please do it.

Note: Unfortunately I have not managed to write correct the formula for "the square" (ie: S2)

3. ### OphioliteValued Senior Member

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Your calculation of the effect of centrifugal acceleration is off by several orders of magnitude. It would be useful to you to check your figures, correct the result and withdraw your spurious speculation.

5. ### EmilValued Senior Member

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2,801

Interesting how easily qualify a mathematical as speculation.
You can do a calculation and you to post the correct result?

7. ### OphioliteValued Senior Member

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I was being polite. When the mathematics is wrong the conclusions aren't even speculation.

Certainly.

The centrifugal acceleration at the equator is given by V^2/R

where V is the velocity in m/second, R is the Earth's radius in metres.

V^2/R = (463^2)/(6378137) = 0.0336 m/s

Acceleration due to gravity 9.81 m/s

Percentage reduction in gravity due to centrifugal effect, 0.0336/9.81 = 0.34%.

If the day length were approximately six hours, then equatorial acceleration would be four times faster and the reduction in gravity would be a little less than 1.4%.

8. ### EmilValued Senior Member

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2,801

You're not polite but careless.
I say what happens at a speed 5.4 times higher ie instead of 24 hours 4.24 hours and you say what happens "day length were approximately six hours."

Try to calculate the resultant force, if you succeed,if the earth rotation speeds 10 times greater.

9. ### NeverflyBannedBanned

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3,576
It's interesting to me how you say that ^ right after having said this:
Instead of bickering over light handed math...
Show Evidence that a catastrophic impact has occurred that radically altered the Earths rotation.
Big Whack Theory excluded.

Last edited: Sep 10, 2010
10. ### OphioliteValued Senior Member

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6 hours - 4.24 hours - lets make it one hour. That will yield a reduction in effective gravity at the equator of less than 10%. your calculations are wrong. Your conclusions are therefore irrelevant, your questions meaningless.

11. ### EmilValued Senior Member

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2,801

It is a simple logical deduction what is foreign to you.

Maybe the earth rotates faster and faster or they will never stop
which means is a "Perpetuum Mobile".
I hope you know what is "Perpetuum Mobile" which means perpetual motion.

12. ### EmilValued Senior Member

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2,801

Even trying to be exact and make accurate calculations.
Expect to emphasize your statements with exact calculations.
If not,you embarrass yourself.
If you are not able, better stay away.

13. ### jmpetValued Senior Member

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1,891
You are literally ignoring 150 years of us burning fossil fuels.... WAKE UP!

14. ### EmilValued Senior Member

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2,801

Sorry, I do not understand.
Can you detailed?

15. ### OphioliteValued Senior Member

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Listen dipshit I have taken a value at and indeed beyond the range you postulate. At that value a simple accurate calculation demonstrates the reduction in perceived gravity is dramtically less than what you claim would occur within the range. You have utterly failed to address that point. So now asshole, address that point and stop equivocating. You have been caught out in an error. You are compounding that error by refusing to acknowledge it. Do so now or continue to look like a fool.

16. ### Fraggle RockerStaff Member

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* * * * NOTE FROM A MODERATOR * * * *

Please keep the discourse civil. Argue about facts, identify errors, and reply specifically to criticism. Discontinue the insults.

17. ### EmilValued Senior Member

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2,801

In addition to philosophers you have not managed to make any exact calculation.
Making a mistake is human but to persist is stupidity.

Ground speed is 463m / s
Multiply by 5.4 and speed is V = 5.4x463 = 2500.2m / s = 2500m / s
V ^ 2 = 6250000
Centrifugal force = V ^ 2 / R = 6,250,000 / 6,378,137 = 0.9799m / s ^ 2 = 0.98m / s ^ 2
Acceleration due to gravity 9.81 m/s^2
Percentage reduction in gravity due to centrifugal effect,0.98/9.81=10%

May take another example, all of the table.

Rotation speed is 12.2 times faster.
V = 12.2x463m / s = 5648.6m / s = 5648m / s
V ^ 2 = 31,899,904
Centrifugal force = V ^ 2 / R = 31,899,904 / 6,378,137 = 5.00m/s^2
Acceleration due to gravity 9.81 m/s^2
Percentage reduction in gravity due to centrifugal effect,5/9.81 = 51% = 50%

So,can you identify any mistake in the calculations?

18. ### ChipzBannedBanned

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838
Fine.

Assuming your other calculations are correct....$\frac{31,899,904}{6 378 137 000} = \frac{5}{1000} \frac{m}{s^2}$

You're off by a factor of 1 thousand, that's a lot.

19. ### NeverflyBannedBanned

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3,576
Wow.

Well, this explains a lot...

20. ### EmilValued Senior Member

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Please do not change what I wrote.

6,378,137,000m or 6,378,137 m ?

21. ### ChipzBannedBanned

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How do you suppose I do it then?

It's obviously 6,378,000 m = 6,378 km *

Last edited: Sep 16, 2010
22. ### NeverflyBannedBanned

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The Earths radius is approximately 6,378 kilometers.

Don't let Chipz small error go to your head. That statement applies to you, Emil, far more.

23. ### OphioliteValued Senior Member

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Once again we value politeness over scientific accuracy. Emil has made an error in his calculations. He refuses to acknowledge it. That is an insult to science to the scientific method and to logical thinking. Such profound insults are tolerated by the administration of this forum, while righteous indignation in the face of intransigent stupidity is condemned. Emil is a dipshit, that is a fact, not an insult. If you feel differently just use your banning powers. I'll try to pretend I care.