Tag Archives: Kinetic energy

11 Ways to REALLY destroy the Earth

End times
By via The Soap Box

For years and years everyone from science fiction writers to scientists have been talking about all of these scenarios and what not about how the world will end (be it by our own hands, or a random act of nature).

While I find many of these scenarios interesting, many of them have a common flaw: they don’t actually end the Earth, just human civilization, and perhaps the human species.

So, how exactly could the Earth REALLY be destroyed (as in cease to exist)?

Well I’ve thought about it, and I’ve come up with about 11 different ways of how it could happen.

So if you don’t mind possibly being scared to death, below are those 11 possible scenarios:

• Planetary impact

planet-impact_250pxWe all know the dangers that a direct impact from either a comet or meteor poses to the Earth as it has been the subject of several movies and books, and is a legitimate threat because it has happened before, and it has wiped out entire species and caused major damage to the Earth throughout our planet’s history.

While some people might believe that it would be the end of the world if a large meteor or comet was to hit us today, it wouldn’t be. It might be the end of human civilization, maybe even our species, but the world will still exist… unless something really big, or really heavy was to hit us…

Lets say something nearly the size of the Earth, or bigger, was to hit us, or something very heavy like a neutron star. The fact is that there would be no way for the Earth to survive an impact by something close to, or larger, or heavier than the Earth. Our world would be broken apart and probably turned into an asteroid field by such an impact.

• High speed impact

The amount of damage a object can do not only depends on how large an object is, but also by how fast said object is going.

A one mile wide meteor hitting the Earth would be devastating. If that one mile wide meteor was to hit the Earth while traveling nearly the speed of light, the amount of kinetic energy released from such an impact would rip the Earth apart, and we wouldn’t even know it until it actually happened (assuming we survived long enough) because such an object would most likely be impossible to find, let alone track.

von Neumann machine

terminator_250pxA von Neumann machine is a type of robot first conceived of by John von Neumann (hence the name) that can basically self replicate, and could even manufacture materials on it’s own in order to do so. It would even be possible for it to seek out the resources it needs to manufacture those materials.

While such a machine would be an extraordinary leap forward in terms of robotics and manufacturing, some people fear that one day one of those robots could go haywire (or someone could build one for the purpose of unregulated self replicating) and continue to self replicate without knowing when to shut off, and ultimately end up destroying the Earth a small part at a time until there is nothing left.

While a larger machine might not actually be able to do this before we stopped it, a small machine like a nano-probe might just be able to do this.

• Knocked into the sun

Lets say a very large object (like a star) was to pass through our solar system, what do you think would happen?

The answer is that the Earth would be knocked out of orbit.

After that one of two things would then happen: The Earth would be knocked away from the sun and become a rogue planet (as well as a giant ball of ice), or we would get knocked into the sun and be burnt into nothing.

Super Laser

DeathStarLaser_300pxIf you’ve ever seen Star Wars then you probably know what I’m talking about, if you don’t then I’ll explain (although I do still recommend seeing Star Wars).

laser is a device that creates a focused beam of light that can actually be quiet destructive, and depending on how much energy you put into the laser, it’s destructive power can range from being harmless (unless you look directly into the beam) to being used to take out a vehicle. Taking this in mind it is theoretically possible to build a laser powerful to destroy the Earth.

Fortunately we don’t have to worry about this one right now due to the fact that the total amount of energy produced world wide is no where near enough to power a laser that would be capable of doing so.

MORE . . .

Dominoes: More Powerful Than You Think


In this image, the National Dutch Science Quiz starts a domino chain reaction that
will topple the towering 26-foot tall, half-ton domino to the left.

Image credit: Dutch National Sciencequiz of public broadcaster VPRO
Rights information: http://bit.ly/WyFBkA

By: Sean Treacy, ISNS Contributor, via Inside Science

(ISNS) — Could a domino small enough to hold in your hand cause a chain reaction that could topple something as big as 112-meter tall tower? It sounds like a plot hatched by a kooky domino-themed super villain, but a new mathematical model shows it’s theoretically possible.

A typical domino is just under 2 inches tall, 1 inch wide, and about one-quarter of an inch thick. These dimensions create a thin block that’s just stable enough to stand upright yet unstable enough to fall over with the slightest nudge.

“If you make them too thick, for instance if you had dominoes like cubes, they would never [fall],” said physicist Hans van Leeuwen of Leiden University in the Netherlands.

Each upright domino is also full of potential energy. When the first domino falls, the force of gravity turns that potential energy into enough kinetic energy to topple a domino larger than itself. That taller, heavier domino stores even more potential energy, and that energy will continue to mount so long as each falling domino’s kinetic energy can overcome the potential energy of their more massive neighbors.

Mathematicians have traditionally assumed that no domino could knock over a neighboring domino more than about one-and-a-half-times its own width, height, and thickness, or a “growth factor” of 1.5. But there was no overarching mathematical model. So, when last year’s annual Dutch National Science Quiz TV Show, run by public broadcaster VPRO, asked how many dominoes it would take to topple a domino the size of the 112-meter-tall Domtoren — the tallest church tower in the Netherlands — van Leeuwen set out to calculate just how much punch a falling domino packs.

But falling dominoes are deceptively complex.

MORE . . .

The above video from The National Dutch Science Quiz demonstrates how a sequence of dominoes can be arranged to topple a very large block.

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