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Q: Why are predicted extra dimensions so small?
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What are the 11 dimensions of M-theory in layman's terms?

4 of these dimensions are the regular ones most of us are familiar with; 3 of these are spatial dimensions: up-down, left-right and forwards-backwards. The fourth one is a time dimension. In a 4 dimensional space you thus require four numbers to uniquely specify a certain location in space and time. A quick example would be the location of a meeting somewhere on Earth; you'd need four bits of information: the latitude and longitude of the location, the height and finally the time of the meeting. In M-theory physicists assume there are 7 additional spatial dimensions. Thus in M-theory you would need a grand total of 11 numbers to uniquely specify a location in spacetime. These additional 7 dimension are not equal to the regular 3 spatial dimensions in one important aspect; they are curled into small loops. This makes them periodic (if you walk in their direction you will after a while end up where you started), and they are very tiny. You can imagine them as small loops of additional space at every location in our regular 4 dimensional spacetime. These loops cannot be seen however because they are so very tiny. If M-theory is correct we might be travelling in these dimensions all the time, but we don't notice it because they are so small. A good analogy Briane Greene used is that of an ant on a garden hose. For the ant the garden hose seems 2 dimensional (3 if you count time); the ant can move forward and backwards on the hose, but it can also move around along the hose in a circular fashion. But if you stand some distance away the hose appears to be a line, a 1-dimensional object. You do not see the second curled-up dimension because it is too small because you are too far away. In this way the extra dimensions M-theory requires are also hidden, but they might be spotted in modern particle collider experiments such as the LHC, since these can be used to probe the small distance scales where these additional dimensions might become important.


The 3 first dimesons are space The fourth is time. So what does the last 7 contain?

The additional 7 (or possibly 8) dimensions, if indeed they exist, would also be dimensions of space and time, but they would be more curved than the more familiar 4 dimensions of space and time that we know and love.


What is the name for the duration in which a force is applied?

In kinematics the product of Force and Time is called the Impulse. It has the same dimensions as Momentum. Thus Force has dimensions [M][L][T-2], so Impulse has dimensions [M][L][T-1], which is the same as Momentum which is Mass x Velocity. So if you apply an impulse of value Ft to a body it causes a change in momentum MV2 - MV1.


How does dimension change?

The length (one of the spatial dimensions) of an aluminum rod increases when the temperature of the rod increases (so does the height and width of the rod - the other two spatial dimensions - but for a thin rod those changes are not as noticeable.


Why hornswoggle so small?

your all poos

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Is extra small bigger than small?

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What is a juniors size small in misses?

it's just a small. if you shop at regular stores they ave sizes small, and extra small. if you shop at stores like Aeropostale, Hollister, American Eagle, Abercrombie & Fitch, or some good Boutique, they have - 3x extra small -2x extra small extra small and small. Trust me i'm an expert when it comes to clothes! Xoxo, Yoopie littlefish


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Fashion is about future wear or style, so fashion wasn't predicted in anty time.


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A pint is a measure of volume so its dimensions are [L3].


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A quarter is a pure number and so has no dimensions.


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A triangle is a plane figure so it has two dimensions: length and breadth.


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Size does not always matter. We're talking Quality, not Quantity.


How many dimensions does a triangular pyramid have?

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