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What makes a water drop round instead of flat?
A water drop is a perfect sphere. A sphere is the geometrical shape that has the smallest surface area for its volume. The drop takes this shape because water molecules tend to stick to each other.
What will happen when a drop of ink is placed gently at the base of a beaker containing water with the help of a dropper?
the ink will mix with the entire water.Even though it is dense than water,it will mix with it
What liquid does gold float on?
Gold can float on water if there's a layer of oil on the surface. To break the surface tension, a drop of Dawn soap will do the trick.
Why does a penny hold more water drops than drops of oil?
Small drops of liquids tend to be spherical because of their surfacetension. Surface tension is the result of intermolecular attractingforces. When you put a small drop of a liquid on a solid surface, theinermolecular forces of the solid surface will tend to attract the liquidmolecules. Depending on the magnitude of the different forces, the solidsurface will present certain degree of 'wettability'. If you compare howa drop of water sits on a clean penny and on a penny that you rubbedwith your fingers, you'll notice that the drops contact angle differ.The drop on the clean penny will cover more contact area (more wettablesurface) than the drop on the 'oily' penny (less wettable surface). Oilreppels water because the intermolecular forces between the water andoil molecules are very weak compared to the intermolecular forces betweensimilar molecules.Now, water intermolecular forces are paricularly strong, and so the dropof water on the penny will resist more than the oil molecules to be spreadedon the surface of the penny. Oil drops tend to wet more the surface of thepenny and will tend to occupy more area. And so you'l get fewer oil dropson the penny's surface.
How can you break the attachment of molecules in the surface tension?
The surface tension of water can be broken by adding dishwashing detergent to the water. This can be demonstrated by filling a bowl with water, then floating a needle in it. This may sound almost impossible, but it can be easily achieved by placing the needle on a tissue, then carefully floating it on the water. When the tissue sinks, the needle should remain on the surface. It is prevented from sinking by the water's surface tension. Carefully add one drop of dishwashing detergent, and the needle will sink. You can prove this was due to the surface tension being broken by trying to float the needle again. If you added enough detergent this should be impossible, as detergent acts as a wetting agent and breaks the surface tension.
What is a three letter word meaning drop bait over water?
Fly
Why do beads of water often form on a slippery surface such as a freshly waxed car?
A waxed car is not hydrophilic, it is not wetted with water. A drop of water falling on such a surface does not speak out wetting the surface. Instead the surface tension of the water drop pulls it into a spherical shape that sits on top of the surface until it either slides off or evaporates.
How much water and soap is needed to remove a drop of oil from a aluminum surface?
you need 3 cups of water and about half a pound of soap to remove a drop of oil from an aluminum surface
Why do water droplets always form one huge drop on a penny?
Surface tension of water draws it into a larger drop. It will do that on any nonporous surface- metal, glass, smooth plastic, etc.
Why does water bead up on a waxed car but gasoline spreads out?
A waxed car is not hydrophilic, it is not wetted with water. A drop of water falling on such a surface does not speak out wetting the surface. Instead the surface tension of the water drop pulls it into a spherical shape that sits on top of the surface until it either slides off or evaporates.
What property of water is being demonstrated when you place a drop of water on wax paper?
The surface tension of water.
What is the shape of a drop of oil placed in the surface of water?
it is lens in shape
What makes a water drop round instead of flat?
A water drop is a perfect sphere. A sphere is the geometrical shape that has the smallest surface area for its volume. The drop takes this shape because water molecules tend to stick to each other.
Why does a drop of oil placed on the surface of water spread over the entire surface?
because the water has more density than the oil so the oil spreads only on the surface.
Why does a drop of water placed on the surface of oil contracts to form a spherical shape?
The surface tension of the water and the fact that oil and water cannot wet each other.
What causes water to skid across a hot surface?
The water vapourizes and in doing so forms a thin gaseous layer between the water drop and the hot surface, thus causing the droplet to bounce across the surface.
How could you figure out the volume of a rock that has broken and chipped edges?
Drop it in water. Fill a graduated cyllinder with water to cover the sample and record the volume. Then gently lower the rock sample into the water and record how much the water rose. The difference is the volume of the rock. Drop it in water. Fill a graduated cyllinder with water to cover the sample and record the volume. Then gently lower the rock sample into the water and record how much the water rose. The difference is the volume of the rock.
