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Short Day

06/09/2018 10:51 PM

For a moment suppose that the tilt of the earth as well as the orbital distance from the Sun, have changed, due to a multi mega ton nuclear test explosion, and instead of 24 hour day, we have a shortened day, and the shift of the earth poles, say North pole to, some where in Sahara, etc.

What will be the state of affairs on earth then ? Can some one do a similar multi mega ton nuclear explosion to bring back the original condition or near about ? SIMILIA SIMILIBUS CURENTER )The homoeo principle ! What will be earth's condition and the number of living things, (Of course, that incluides the species Homo Sapiens) there after ?

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#1

Re: SHORT DAY

06/09/2018 11:09 PM

Should such an event occur, I would expect that personal devices would be rendered inoperative throwing the populace into A PANIC.

Crops would wither and die... this event would likely be a global killer.

Any effort to return the planet to our current state would be unsuccessful.

What is homoeo principle?

When are you thinking of detonating these thermonuclear devices? Are you in North Korea?

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#2

Re: SHORT DAY

06/09/2018 11:28 PM

This shouldn't be a problem. I doubt humanity is capable of doing this or ever surviving such a cataclysmic change in my lifetime. The Chicxulub impactor is not believed to have significantly changed Earth's orbit, axis of rotation or even rotation tilt but it still caused the Cretaceous-Paleogene extinction.

If it were to happen then Samantha will just twitch her nose and everything will be good again.

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#3

Re: SHORT DAY

06/10/2018 2:01 AM

"What will be the state of affairs on earth then"

The Earth will still be around.

Life, as we know it, will no longer exist.

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#4

Re: SHORT DAY

06/10/2018 11:09 AM

To start with, as incredibly powerful nuclear bombs are, they are nothing compared with the energy stored in a rotating planet. So I doubt that we could alter the length of the day by more than milliseconds. As far as varying the distance from the sun, the orbital energy is much greater than the rotational energy of the earth. For the poles to shift would require that the mass distribution of the earth to change so that there was a new stable axis of rotation, which would entail moving an incredibly large amount of mass. The only way I could see that happening is in a collision with another astronomical body.

And as to the question of whether we could fix it if it happened, the answer is no way. Civilization is only skin deep and would quickly disappear under these circumstances. Some life forms might survive, the ones you can see under a microscope.

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#9
In reply to #4

Re: SHORT DAY

06/11/2018 12:02 AM

Some life forms might survive, the ones you can see under a microscope.

.... and cockroaches?

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#5

Re: Short Day

06/10/2018 12:28 PM

A multi megaton explosion on the surface is not going to change the distance from the sun noticeably. It would be very difficult to even get something in the megaton range to alter the speed of the day much, much less move the axis of rotation to some new inclination.

Mass would need to escape Earth gravity to affect a lasting change in distance from the sun. Change on axis of rotation or day length could occur with changes in mass distribution, but the changes necessary to affect meaningful change would dwarf explosions for which multi Megaton would be a convenient measure of power, by orders of magnitude, multi orders of magnitude.

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#6
In reply to #5

Re: Short Day

06/10/2018 1:36 PM

Our OP starts his question with “For a moment suppose...”

As redfred points out the K/Pg impactor seems to have little affect on the Earth orbit and inclination, but that event was nearly a global killer. Should we be unfortunate enough to see another Theia sized impactor...

Been good to know you all.

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#16
In reply to #6

Re: Short Day

06/13/2018 11:27 AM

Perhaps the K/pg impactor hit the Earth very squarely. Perhaps something striking more obliquely could impart some significant new rotation without killing everyone....

On second thought, probably not.

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#7

Re: Short Day

06/10/2018 6:01 PM

And how will it affect my 401K?

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#14
In reply to #7

Re: Short Day

06/11/2018 2:18 PM

It wasn't worth much anyways.

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#8

Re: Short Day

06/10/2018 11:51 PM

Just as a thought experiment, suppose you did not use some kind of nuclear blast, but instead a Genie appeared, and you said, "Jeannie, I've been dreaming of you changing the Earth's rotation from almost sort of vertical with respect to the ecliptic, to parallel to the ecliptic, kind of like Uranus, which has an axial tilt of 97.77 degrees."

Now assume that Jeannie goes ahead and does this nicely, which means that she doesn't destroy the crust or the mantle or the core, and that the oceans don't suddenly slosh over all the continents several miles deep at a thousand miles per hour, and the atmosphere doesn't suddenly have chaotic, thousand-mile-per-hour winds. What would it look like?

You'd have a planet with extreme seasons. Suppose you start with the axis of rotation pointing perpendicular to the sun, parallel to the direction of the orbit. There would be days and nights just like now, at the equinox when days and nights are of equal length. At both poles, the sun would appear to be circling around the horizon and would not set.

Then 3 months later, one of the poles would be pointing directly at the sun. At that pole, the sun would directly overhead. If there was land there, like the Antarctic, it would bake under constant direct sunlight, and the sun wouldn't disappear below the horizon at the pole until 3 months later, so it would have continuous sunlight for a total of 6 months. I expect the ice sheets at the Antarctic would completely melt and/or collapse into the oceans within a few years or decades or centuries, and the oceans would rise a few hundred feet, perhaps in sudden leaps.

At the same time, the opposite pole would have continuous winter. The sun would not appear for 6 months. If it was land, it might accumulate ice, and if it was sea, it would freeze like the Arctic.

Weather patterns would carry heat and humidity from the hot areas to the cold areas, so it would rain and snow on the cold areas.

Also, if Jeannie can change the Earth to be this way, presumably she can change it back.

That's about as much as I can say with confidence.

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#11
In reply to #8

Re: Short Day

06/11/2018 7:48 AM

It has become fashion to charge Man, for every change happening in nature, like global warming, increase in CO2 etc. So I thought, why not make him the culprit for this astronomical happening too.

It is just a figment of imagination about short day. I did some exercise a few years back and of course, not scientifically, but fictionally came to some conclusions, may be erroneous.

1.Gravitational pull is reduced, since the earth rotates faster.

2. There would be migration of ice caps to the new poles.

3. There could be heavy rainfall in Sahara.

4. There would be a phenomenal raise in ocean levels, inundating most coastal areas,

and finally,

5. Human population would fall to twenty percent of the present, and the survivors try to bring back the 24 hour day, by an exact re-enactment of the original nuclear explosion at the right time and angle etc.

Homoeopathy believes that what causes a particular symptom, would cure it, when the symptom exists. I am not from North Korea, or for that matter USA, which started the nuclear bomb race.

There is nothing more to it, except as pure fiction, just to exercise the brain.

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#12
In reply to #11

Re: Short Day

06/11/2018 8:34 AM

<...fiction....> Ahah. All has become clear.

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#10

Re: Short Day

06/11/2018 6:05 AM

One cannot suppose that, because angular momentum is conserved.

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#13

Re: Short Day

06/11/2018 11:06 AM

One thing to point out is that there is actually a museum where static displays of multi mega ton devices are presented. Presumably to allow future generations to view ancient artifacts.

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#15

Re: Short Day

06/12/2018 10:51 AM

I'd be more concerned of earth's magnetic poles flipping. There's a better chance of that happening...

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