Circumferemce Of Planet Earth . .

2.3 Billion Eh, I suppose that's enough time :) I wonder what this board will look like then - will they still be using Excel?
 

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Using a mouse in Excel is the work equivalent of wearing a lanyard when you first get to college
Nah, everyone will have a computer chip in their brain, hunting for Sarah Conner.
 
Thanks for the explanation Diddi, well done. If it is true that the moon is escaping earth's orbit at roughly 1 inch per year, and I have no reason to doubt this position, and it is also true that the moon's gravitational force is what stabilized the earth on it's 24 degree tilt and controls the speed of earth's rotation so that a day is 24 hours, then at what point will the moon be far enough from earth so that earth's tilt will become unpredictable and the length of each day will increase? Which is more likely to occur first, the complete escape of the moon from earth's orbit or the exhaustion of the sun's energy source? I am only asking so I can plan ahead!

The Sun will be around for the next 5 billion years... so no worries there :)

Though after some time, we may actually be within the Sun (not for another 3 billion years or so.... so lots of time to plan ahead :))
 
I wonder what this board will look like then - will they still be using Excel?

I expect that we shall discover that the board is run by mice and that the all the cyber-dolphins will have left cyber-earth saying 'so long and thanks for all the cyber-fish'
 
Hmmm, you are right, I think they estimate that the sun will be around for another 5 billion years or so, but since the sun gets 10% hotter every 1 billion years, we may have moved our unruly species to another home by then:) Maybe some distant planet where the laws of physics work like Road Runner Cartoons :)

Also Sandeep - you may have a valid point about dark being faster than light. Based on observations, the universe is expanding at an increasing rate, and that in defiance of gravity, and scientists don't seem to know how or why it is expanding, so they have called the force that is expanding the Universe "Dark Energy." It could be expanding faster than the speed of light . . .I suppose . .
 
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Also Sandeep - you may have a valid point about dark being faster than light. Based on observations, the universe is expanding at an increasing rate, and that in defiance of gravity, and scientists don't seem to know how or why it is expanding, so they have called the force that is expanding the Universe "Dark Energy." It could be expanding faster than the speed of light . . .I suppose . .

Actually scientist havent been able to figure out the amount of matter present in the universe. According to current theory (or at least the ones prevalent 6 years ago when I did my Masters) there are 3 possible endings for the Universe depending on something called Critical Density (Ω)..

1. If the amount of matter is more than Ω then in time gravity will take over causing the universe to collapse.
2. If the amount of matter equals Ω then in time the acceleration and gravity will balance each other and the universe will just be.
3. If the amount of matter is lesser than Ω then the universe will continue to expand forever...... This, if I recollect correctly, is the current proposed fate, since scientists say that dark energy exerts negative pressure, which counters the attractive force of gravity.


Maybe some distant planet where the laws of physics work like Road Runner Cartoons :smile:

Cartoon Laws of Physics :biggrin:

Cartoon Law I: Any body suspended in space will remain in space until made aware of its situation.

Daffy Duck steps off a cliff, expecting further pastureland. He loiters in midair, soliloquizing flippantly, until he chances to look down. At this point, the familiar principle of 32 feet per second per second takes over.

Cartoon Law II: Any body in motion will tend to remain in motion until solid matter intervenes suddenly.

Whether shot from a cannon or in hot pursuit on foot, cartoon characters are so absolute in their momentum that only a telephone pole or an outsize boulder retards their forward motion absolutely. Sir Isaac Newton called this sudden termination of motion the stooge's surcease.

Cartoon Law III: Any body passing through solid matter will leave a perforation conforming to its perimeter.

Also called the silhouette of passage, this phenomenon is the specialty of victims of directed-pressure explosions and of reckless cowards who are so eager to escape that they exit directly through the wall of a house, leaving a cookie-cutout-perfect hole. The threat of skunks or matrimony often catalyzes this reaction.

Cartoon Law IV: The time required for an object to fall twenty stories is greater than or equal to the time it takes for whoever knocked it off the ledge to spiral down twenty flights to attempt to capture it unbroken. Such an object is inevitably priceless, the attempt to capture it inevitably unsuccessful.

Cartoon Law V: All principles of gravity are negated by fear.

Psychic forces are sufficient in most bodies for a shock to propel them directly away from the earth's surface. A spooky noise or an adversary's signature sound will induce motion upward, usually to the cradle of a chandelier, a treetop, or the crest of a flagpole. The feet of a character who is running or the wheels of a speeding auto need never touch the ground, especially when in flight.

Cartoon Law VI: As speed increases, objects can be in several places at once.

This is particularly true of tooth-and-claw fights, in which a character's head may be glimpsed emerging from the cloud of altercation at several places simultaneously. This effect is common as well among bodies that are spinning or being throttled. A `wacky' character has the option of self-replication only at manic high speeds and may ricochet off walls to achieve the velocity required.

Cartoon Law VII: Certain bodies can pass through solid walls painted to resemble tunnel entrances; others cannot.

This trompe l'oeil inconsistency has baffled generations, but at least it is known that whoever paints an entrance on a wall's surface to trick an opponent will be unable to pursue him into this theoretical space. The painter is flattened against the wall when he attempts to follow into the painting. This is ultimately a problem of art, not of science.

Cartoon Law VIII: Any violent rearrangement of feline matter is impermanent.

Cartoon cats possess even more deaths than the traditional nine lives might comfortably afford. They can be decimated, spliced, splayed, accordion-pleated, spindled, or disassembled, but they cannot be destroyed. After a few moments of blinking self pity, they reinflate, elongate, snap back, or solidify.

Corollary: A cat will assume the shape of its container.

Cartoon Law IX: Everything falls faster than an anvil.

Cartoon Law X: For every vengeance there is an equal and opposite revengeance.

This is the one law of animated cartoon motion that also applies to the physical world at large. For that reason, we need the relief of watching it happen to a duck instead.

Cartoon Law Amendment A: A sharp object will always propel a character upward.

When poked (usually in the buttocks) with a sharp object (usually a pin), a character will defy gravity by shooting straight up, with great velocity.

Cartoon Law Amendment B: The laws of object permanence are nullified for "cool" characters.

Characters who are intended to be "cool" can make previously nonexistent objects appear from behind their backs at will. For instance, the Road Runner can materialize signs to express himself without speaking.

Cartoon Law Amendment C: Explosive weapons cannot cause fatal injuries. They merely turn characters temporarily black and smoky.

Cartoon Law Amendment D: Gravity is transmitted by slow-moving waves of large wavelengths.

Their operation can be witnessed by observing the behavior of a canine suspended over a large vertical drop. Its feet will begin to fall first, causing its legs to stretch. As the wave reaches its torso, that part will begin to fall, causing the neck to stretch. As the head begins to fall, tension is released and the canine will resume its regular proportions until such time as it strikes the ground.

Cartoon Law Amendment E: Dynamite is spontaneously generated in "C-spaces" (spaces in which cartoon laws hold).

The process is analogous to steady-state theories of the universe which postulated that the tensions involved in maintaining a space would cause the creation of hydrogen from nothing. Dynamite quanta are quite large (stick sized) and unstable (lit). Such quanta are attracted to psychic forces generated by feelings of distress in "cool" characters (see Amendment B, which may be a special case of this law), who are able to use said quanta to their advantage. One may imagine C-spaces where all matter and energy result from primal masses of dynamite exploding. A big bang indeed.
 
Good Show Sandeep! My wife yelled at me for laughing so loud :) :) That's just good stuff! I think I will cut and paste the laws and send to my co-workers tomorrow :)

But I understood that they have estimated Dark energy to compose roughly 70% of the universe, dark matter roughly 25% of the universe, and the remaining composite of roughly 5% to be ordinary matter. Is that not the case? Also, if the universe continues to expand as is the case, those ratios will change, correct?
 
But I understood that they have estimated Dark energy to compose roughly 70% of the universe, dark matter roughly 25% of the universe, and the remaining composite of roughly 5% to be ordinary matter. Is that not the case? Also, if the universe continues to expand as is the case, those ratios will change, correct?
No, there will be more "space" in between them. I think that is what is referred to as the Big Freeze, because it'll get really cold without any energy what so ever.

Anyway everyone knows the world is held up by four elephants riding a turtle. So I don't see what this supposed "shape" has to do with anything.
 
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Nopes. The ratio will not change because, per basic laws of physics, the total amount of mass and energy in the universe remains constant. So, even if new matter is being created continuously (via quantum effects), equal amount of matter will disappear somewhere else and the end result of amount of enery+mass is the same.

The "Big Freeze" occurs when, due to continous expansion, the universe becomes so big and the galaxies/stars have such vast distances between them (much much much larger than the current distances) that light is heavily red shifted = very low energy = no heat = cold.

Additionally, after some amount of time, all stars will have exhausted their fuel and so no new star will be born. (The Sun is at least a 2nd generation star, if not a 3rd generation star). This will contribute to the freezing of the universe.

However, it is possible that scientists are completely wrong about what dark energy actually is and it may turn out that we have more matter than Ω, the end result being the universe will collapse - probably leading to another big bang (which is what I believe will happen in the end).
 

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