i saw them almost in every capped pen (pen with cap) i use. i heard that the hole functions as a ventilation, but wat exactly is its function?
218372
its so the pressure in the pen, when the ink leaves, when you write, is equal to the outside pressure. ink can still flow with gravity, otherwise a partial vacuum would form
235731
Good question large man. The reason for this is because when the vacuum is running and you have a little piece of garbage in your hand you can either turn off the vacuum (or leave it running) and walk to the garbage. Or you can stuff a little piece of dirty floor garbage in our pocket, sound nice? Also, people understand intuitively that the reason the vacuum didn't get the string was because it had been worked into the carpet a little, and the vacuum had just made it worse so far, picking it up and putting it down again just undid that, so the vacuum has a good shot now. Personally, i pick up the vacuum nozzle and put the string right in the little hole. If i was a little smarter, i might realize that there is a little opening in the shaft that i could put it in. That's probably what the little opening is for anyway. I don't know. Good follow up question: "What the hell is that little slidey opening on the shaft a of a vacuum for?"
643528
Please note, this is not science, this is a science JOKE! \n\n"As with all things, dark suckers don't last forever. Once they are full of dark, they can no longer suck. This is proven by the black spot on a full dark sucker.\n\nA candle is a primitive dark sucker. A new candle has a white wick. You will notice that after the first use, the wick turns black, representing all the dark which has been sucked into it.\n\nIf you hold a pencil next to the wick of an operating candle, the tip will turn black because it got in the way of the dark flowing into the candle. Unfortunately, these primitive dark suckers have a very limited range.\n\nThere are also portable dark suckers. The bulbs in these can't handle all of the dark by themselves, and must be aided by a dark storage unit. When the dark storage unit is full, it must be either emptied or replaced before the portable dark sucker can operate again.\n\nDark has mass. When dark goes into a dark sucker, friction from this mass generates heat. Thus it is not wise to touch an operating dark sucker.\n\nCandles present a special problem, as the dark must travel into the solid wick instead of through glass. This generates a great amount of heat. Thus it can be very dangerous to touch an operating candle."
549187
they are used to draw the moisture out of the air and keep things dry.\n\nthey tell people not to eat it because they don't want to get sued by stupid people.
128771
it sounds like a heat related problem does it do this when first started after a cooldown cycle? laptops have to disapate alot of heat without all the space and fans of a desktop some models do it better than others try placing the laptop on the edge of books so there is about 4 inches of free space under the laptop that way it gets good airflow if that corrects the problem then you know it is heat related, you can buy an after market laptop cooler that you place under the laptop which should keep it cool enough it was a heat related problem that should fix it
463184
Their underground tunnels contain many rooms, including bedrooms, nurseries, and bathrooms. These tunnels, or burrows, even include a listening room close to the entrance, where the prairie dog listens for danger before going outside. The burrows go down about 3 meters and can be 15 meters long. \n\nWhat is even more interesting is the way prairie dogs build the entrances of their burrows. They surround the holes they have dug with piles of soil to form a conical shape. These mounds serve as lookouts and protect the burrows against floods. \n\nA close look at the two entrances of a burrow shows that one is taller than the other. This difference is not coincidental. Prairie dogs have figured out that they can ventilate their burrows by building the entrances this way. They actually create a natural air conditioning system! And while prairie dogs might not realize it, they are using Bernoulli's principle to create a natural flow of air in their burrow.
292708
They're capilaries (can't spell!) and allow the transfer of substances back into the blood. Everything but red blood cells leaves the blood in the bowmans capsule and in the tubules the 'good' stuff (sugars, etc) transfers back into the bloodstream   (the capillaries beign close to the tubules and only a single cell think with a moist lining, allows for diffusion) while the other stuff (excess water, etc) passes out into the bladder.
242267
Actually they often do, but people don't use them as such.  I use mine for coins.  \n\nIf yours didn't come with one, perhaps they're trying to tell you something, namely: "please quit smoking.  Our fossil fuel-burning guilt is too much to bear already."
367124
The ink is not travelling in or out of a cell, so the last three are out because they require travelling through channels. The answer is diffusion.
135845
i like their ink sacs!  and if you dissect one, they have a special pen (remnants of the shell in molluscs) that you can write with!  so fun!  \n\nps. there are seen in all squids
269097
1) The oxygen in the outside air enters the rodent's body through the twin nostrils.\n\n2) From there it enters the trachea through glottis.\n\n3) From the trachea or the wind pipe it goes to its twin branches called bronchi .\n\n4) From each bronchus it enters one of the twin lungs.\n\n5) The tiniest part of the lung is called alveolus (plural is alveoli). It is like an inflated balloon. The air in side this balloon is the fresh air  inhaled.\n Now imagine your ten fingers covering an inflated balloon from all the sides. That is how the blood capillaries cover the alveoli. These blood capillaries have extremely thin wall through the oxygen, which is at a higher concentration in the fresh air of the alveoli, diffuses in the blood capillary. It is immediately picked up by the hemoglobin in the Red blood cells forming oxyhemoglobin. It is the source of oxygen to the body. This is then taken to different parts of the body and given to them.\nAt the same time, CO2 collected from the body parts and brought to the alveoli by those vary capillaries diffuses in to the air of the alveoli because its concentration in the capillaries is greater. \nThe air in the alveoli is now stale air rich in CO2 and poor in O2. It is exhaled out.\nThus, the gaseous exchange can occur only on the surface of the alveoli. Their walls are as thin as the walls of a soap bubble, only that they are not fragile like soap bubble.
184670
The pressure of air above the sheet is reduced. The pressure below the paper is high. So the paper is lifted up.\n\nSince the air blow is not uniform. There will be fluxtuation of pressure in different parts will be different. Hence the paper will fluctuate in different proportions.
411953
It sounds like it has some trash (i.e. food) caught under the key.  On most laptops you can pop each individual key off and clean underneath.  Not sure about yours.....  \n\nKeep the soda and chips away from the keyboard.  :)
563602
cos its ezier.......takes les time 2 type stuff out dat way.......WATS RONG WIT CAPS???
268811
both.  the friction, as well as creating its own heat, slows the airflow, which aggrivates the compression along the leading edges.\n\nI'm pretty sure.  don't put this on a physics test and then blame me.
592832
Honestly?  I think it has to do with pens in space... and I swear, it explains a lot.\n\nThe first time astronauts went up into space, they discovered their pens didn't write.  No gravity, nothing to push the ink out of the pen and onto the paper.  The astronauts came back, they reported their pens didn't work, and NASA literally spent fifty million dollars or so to engineer a new type of pen which could operate independent of gravity so no matter how you write on it, if you're writing while the pen is pointing down, while it's pointing up, whatever, the pen still writes smoothly.\n\nThe first time Russia sent cosmonauts up into space, they discovered their pens didn't write.  No gravity, nothing to push the ink out of the pen onto the paper.  The cosmonauts came back, they reported their pens didn't work, and the people assigned to fix the problem walked up and said "here are some pencils, use those next time".\n\nI'm sure that's probably an apocryphal story (though, oddly, we do have a "space pen" which works from any angle and without the need for gravity... and we must have had some reason for designing it and then naming it the "space pen"), but it gives a glaring example of a point which we may not always keep in mind:\n\nA lot of the time, we just don't have a lot of common sense, so the easy, everyday solution often doesn't dawn on us, even as we're reaching for the stars... \n\nAnd are you really surprised?  You are talking about people who, in their genius, never thought "maybe it would be a good idea if the filters one part of the space ship can be swapped with the filters in another part in case they need to be changed".
305852
They are tiny little spaces found in the rock. These rocks are often referred to as porous permeable rock which means they have tiny interconnected spaces which allows the oil to reside.\n\nOil is usually sitting on top of water. That is how it is naturally found. When it is pumped out, the residual water fills up the spaces.\n\nRemember there are no big voids or holes made in the ground during this process. Oil doesn't sit in large underground cavarns or holes.