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When a cup is filled with water with a card on top of it is turned upside down the water does not fall out why?
because the pressure on the inside is less than the pressure on the outside of the cup, so the card remains on the bottom of the cup when it is tipped over.
Why does alcohol cling to a glass rod while mercury does not?
Cohesion is the tendency of molecules to be attracted to similar molecules. Adhesion is the tendency of molecules to be attracted to dissimilar molecules.Water is both cohesive and adhesive, as is ethanol alcohol. The cohesiveness of water can be demonstrated by filling a cup with water and placing a wet clothe over the top of the cup, then flipping the cup upside down. The water will not entirely spill out of the cup.Mercury is cohesive, but not adhesive, so two drops of mercury will absorb one another, but dipping a clothe in mercury will not absorb it.The phenomenon of cohesion and adhesion can be understood by looking at the molecular structure and charge distribution of a molecule.
What will happen energetically to a cup of boiling hot water that is added to a cup containing a cold piece of metal?
choices are: The cold will flow from the metal into the hot water, causing the hot water to warm up and the metal to cool down. b. The energy from the hot water will flow into the cold metal, cooling the water down and heating up the metal. c. The cold will flow from the metal into the hot water, causing the hot water to cool down and the metal to warm up. d. The metal will cool down because the specific heat of water is high.
What is heavier bottle of water or cup of water?
A cup of sand, sand sinks in water, thus its heavier.
What cup will freeze water faster glass or a foam?
I assume you mean the water in the cup. Foam is a better insulator than glass, so it should be the water in the glass cup.
How does water not spill out when glass covered with card board upside down?
When filling a cup/glass with full water the card/lid will not stay up.
How does a cup of water stick to a piece of cardboard?
You get a peice of cardboard fill a half cup with water and push the cardboard on top and turn it upside down
When a cup is filled with water with a card on top of it is turned upside down the water does not fall out why?
because the pressure on the inside is less than the pressure on the outside of the cup, so the card remains on the bottom of the cup when it is tipped over.
How is cupping done?
To create a vacuum, a flame from a lighter or a burning cotton ball is placed in an upside-down cup. When the oxygen in the cup is burned off, the cup is placed directly on the skin
Describe an experiment to show air has pressure?
1. Take a cup, and fill it about halfway with water. 2. Next cut a piece of paper big enough to cover hole of cup 3. Flip cup upside down securing it with your hand (do this over a sink just in case) 4. Now let go of paper and observe. The paper should stay in place because the air pressure is pushing up against it.
What do the Dairy Queen attendant do when they give the blizzard to the customers?
They turn the cup upside down to show you how thick the ice cream is.
What is the purpose of gravity free water?
how does the gravity free water stay inside the cup
How much water do you add to one bag of cement?
Start with one gallon. Mix the cement with a shovel. Sometimes you may have to add a little more water. You do not want to get it to thin and soupy because it will cause it to loose strength. For best results fill a plastic cup with the mixed cement. Turn the cup upside down and lift the cup up. The final mix should stand close to half the height of the cup.
If you put a cup of chlorine in 14 inches of water how long will it stay in the water?
that deep-ends on the volume of water
How long does it take for a flea to drown?
Fleas will stay alive on the surface of a cup of water for days. Most often they will crawl out and escape. They can even escape from the sink when you run the faucet on them. Push them down into the bottom of a cup of water and they will die within seconds due to the pressure of the water on their little flea lungs.
Science projects for kids?
A good one for air pressure in physics is to do an experiment circus where they are in pairs and go around the classroom trying out up to 5 different experiments. One is filling a coke can a third full of water, then heating until steam rises from the can and then using a clamp turn it upside down and into a basin of cold water. Watch the can be crushed by the difference in pressure. Another is filling a plastic cup full of water and placing a piece of card on top then turn the cup upside down and the card will stick. Then, you could try and pull apart two hemispheres in a vacuum.
How do you keep hot water hot in a cup?
try covering the glass, so the heat particles stay inside the cup, and the hot water stays hot.
