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Depends on the paper. Computer paper is usually 8.5" by 11". Notebook paper may be 8.5" x 11", but some is slightly smaller.
A piece of paper has three dimensions. They are the length, width and thickness of the paper. Paper is available in many sizes such as A1, A3, A4 and A5.
Do you mean 'How many cats can you draw on a piece of paper'? It depends on your art style and how big you draw them So you mean, 'How many cats can stand/sit/lie on a piece of paper at once'? It depends on the size of the cats, and the size of the paper actually, any answer to your loose question depends on the size of the paper.
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A regular piece of paper typically weighs around 4 to 5 grams.
A Regular American/Canadian piece of paper is 8.5inches by 11 inches. All the paper has to be is big enough to hit the big to come out.
It's physically impossible to fold a piece of paper more than 7 times.
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a lot
a piece of paper is a 3D object it has a front and back face + two side edges + a top and bottom edge = 6 sides a piece of paper has 6 sides
You screw the drain piece out of the tub. Not easy,as there are many threads on it. You can get a special tool for it in plumbing stores.
The number of paper airplanes possible would be a function of their individual sizes. It could be one paper airplane, or many.