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If the weight of the water is less than the air pressure inside of the test tube.
Try this on your friends. Fill a glass to the brim with water. Place a piece of flat cardboard over the rim of the glass. Place your hand over the cardboard and invert the glass. Take you hand away and the water will remain in the glass. Air pressure again come into play here.
Try this one as well. Place a small lighted piece of paper in to an empty plastic bottle or tin can. The lighted paper will burn up the air in the container and will eventually go out. Because there is now a partial vacuum in the container the outside air pressure will try to fill the space and will gradually crush the bottle or can.
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MaxineI'm not quite sure what your experiment is.
But, if you prevent air from entering a cup, then the water can not escape (up to a 34 foot column which gives the equivalent pressure of 1 ATM).
So, for example, you could take a cup full of water. Place a shallow bowl, or perhaps even a saucer on the cup, then invert it. A little water will escape during the inversion process, but once a seal is made with water around the base, no more water will come out because air is unable to get in through the layer of water.
An "automatic waterer" for small animals often works on the same principle. A jar full of water is inverted on a base. The base has a small air hole on a side (to control the level). If the air hole is submerged, then the water remains in the jar. Once the animal has drank enough water to expose the air hole, then an air bubble enters the jar, and more water is released.
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Which scientist worked in the field of pressure?
Oxygen was discovered for the first time by a SwedishChemist, Carl Wilhelm Scheele, in 1772.
Does cold water stay colder in a plastic cup or a foam cup?
You're talking about holding the temperature of the water, right? As far as containing the liquid, they're about equal...but a styrofoam or double-wall plastic cup would hold temp better than a glass cup which would work better than a single-wall plastic cup.
How can you clean mold from a water jug inside?
If the mold inside a water jug is old or dried on, fill the jug with hot, sudsy water and let it stand for 20-minutes. Pour in 1/3 cup dry, uncooked rice and 1/3 cup baking soda. With the lid tightly closed, shake the bottle several time. The rice will loosen the mold and the baking soda will remove odors. Carefully open the lid, and pour the contents down the drain. Fill the jug half-full of hot water, a drop of dish soap, and shake well. Pour contents out and rinse thoroughly. Allow to air-dry upside down.
What objects have matter?
alot of objects have matter like the following: gas, water, hair, the sun, air. and sunshine doesnt have matter. air has matter because if you put an upside-down cup with a wad of paper in the bottom and you stick it in the water upside-down and when you take it out if you did it right then the paper is dry so that proves that air has matter
How many ounces in 1 cup water?
1 cup = 8 fluid ounces, regardless of what's in the cup. Even if it's empty.
