ven a thin tube of insuficient lenth in placed verticaly in water,how dos d water know dat tube is insuficien?
604112
I thing you are referring to surface tension pulling the water up the tube. The water can't be pulled past the end of the tube since there is no tube after that to pull on. In other words the water doesn't know the tube is too short until it gets to the end.
761118
a. by the proccess of titration.  few drops of universal indicator are poured onto the base. acid is poured  slowly with the help of the burette. when the base is decolourised this indicates that it has been neutralised.\n\nb. vinegar\nc. all of the above\nd. 7
313595
Water... its got a pH=7
332934
Take a glass full of water. Put an ice cube on the surface. It will float on it.  Wipe out the spilled water. \n\nAfter certain time when the ice cube is completely melted, you can observe that not even a single drop of water spilled out and the water surface is still up to the brim.\n\nThis shows that the volume water displaced by the ice cube when it floated is equal to the volume water when it is completely melted.\n\nSince it was floating, the weight of ice cube is also equal to the weight of the diplaced volume of liquid.\n\nThis again shows that the density  of ice is lesser than water.
1022856
A water gauge would have been used. A hosepipe fitted both ends with glass rod, filled with coloured water, and of course it would be level
845325
A red tube used for cleaning pipes.\n\nCoach
615923
you either urinate it out or you crap it out.  The water content can also leave your body by your poars in your skin and it evaporates into the air.
903478
fat content\n\n\nthe fattier it is, the more it'll float
368357
The test liquid will sink to the bottom because it is more dense than water. Water has a density of 1.0 g/ml. There fore it can be simply thought of as "lighter."\n\nThere will be two visible separate layers.
149069
since water seeks its own level, just connect a tube at the bottom of two 5 empty gal jugs so that water can flow in one another then plug the tube opening with cotton . fill one with 5gal of water and the other with 3gal of water.Now remove the plugs GRAVITY will do the rest dividing the two volume of water into   two eqaul 4gal jug of water . No water is wasted.
1164529
Visking tubing is partially permeable.\ncut 2 pices of Visking tubing 12cm long.tie one end of each with cotton.fill "cell A" with sugar solution & "cell B" with water.tie the other end & weigh each "cell".put "cell A" into a beaker of water.put "cell B" into a beaker of sugar solution.after 30 minutes reweigh each "cell".Cell A increases in weight because water has passed into the cell,into the srong solution by osmosis.Cell B decreases in weight because water has passes out of the cell,into the strong solution by osmosis.\nhope that helped-cheers!
902905
Ok. this is simple. u need to know about buyoancy, like how air is lighter than water. all you really got do is put some small weights (ex. paper clips, rocks, etc) in the bottle. have it so that it will just barely float. then cut a hole to the side and insert the end of a tube in it. make sure it is water tight. then place it in a tub. it shold float, when you suck on the end of the tube, it should take some of the air out making it less buoyant, and therefore it will sink. there are also many other ways to do this that will make it function more like a real submarine like putting the bottle with weights inside and somehow add pressure to the the outside of the tube to compact the air inside the bottle, causing it to sink. good luck on your project
645144
you could breathe through a tube down as deep as perhaps one atmosphere.  beyond that the surrounding water pressure on your chest would prohibit you from taking a breath from surface air.
953822
Think about the relative concentration gradients of specific solutes. You clearly wouldn't infuse something that would cause water to move out of the vasculature into the brain, you would want something that would do the opposite.
916209
The easiest way to understand osmosis is to think about a bottle of strong perfume.  When you take the lid off the molecules spread out filling the room slowly with smell.  Molecules move from an area of high concentration to an area of low concentration.  (that is your answer, I believe)  Another way to understand it is to drop food coloring into a large bowl of water.  It will slowly spread throughout the bowl.
50608
Built into each device is a microprocessor with a built-in miniature diferential hydrometer.  They detect the slightest presence of running water.\n\nThe only solution is to toss these devices.
936945
The best way to find the volume of a liquid is just to put it in a liquid measuring device, graduated cylinder or measuring cup. \n\nFor a solid, a displacement test is good when the shape is irregular. \nex. fill a graduated cylinder with enough water to ensure that when you place the object in the water it will be completly submerged. Note the volume. Place the object in the water, the water level will increase. The amount of the increase will be the volume of the object.