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Cold custard has a greater surface tension than water, Hence the reason you can run on it.
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Why needle with grease float on water surface?
Surface tension. Translated that means that the attraction between the water molecules (to each other) is greater than the force (gravity) pushing the needle down.
What does the term interfacial tension mean?
The term interfacial tension or surface tension means the contractive tendency of a liquid that lets it resist and external force. Interfacial tension could be observed from the floating of objects on the surface of water, even though they are more dense than water.
Why did the needle float easier on the water than on alcohol?
Water has a much stronger surface tension than alcohol does. Because water molecules are highly polar, they have a relatively strong attraction for each other (as compared to the attraction that the molecules of most other liquids have for each other) and this creates a kind of limited solidity on the surface, called surface tension. The alcohol molecule is much less polar and has much less attraction for other alcohol molecules, and correspondingly less surface tension. It is the surface tension that can support a needle on the surface of the water, despite the fact that the needle is denser than water and is not buoyant enough to float.
Why does the pepper run away when soap is added?
Soap disrupts the surface tension of water. So if you have fine particles floating in water (I personally use parsley flakes, which float better than pepper does) and you put a tiny trace of soap on your finger, and then touch the water, it breaks the surface tension at that point - but the surface tension of the water on the OTHER side of the flake is unchanged. The surface tension pulls the flakes away from the soap. So the flakes aren't running away - they are being released from the surface tension!
Does fresh water have more surface tension than salt water?
Cold water has stronger (better) surface tension.Surface tension is dependent on temperature. For that reason, when a value is given for the surface tension of an interface, temperature must be explicitly stated. The general trend is that surface tension decreases with the increase of temperature, reaching a value of 0 at the critical temperature.From: http://en.wikipedia.org/wiki/Surface_tensionAdded emphasis for readability.dfsfdytrhjtkjkjh
Why can water support objects that have greater densities than water?
Surface tension.
Why does tap water have greater surface tension than soapy water?
Because honey is stikier
Does water have greater surface tension than honey?
No. Try slapping the surface of a bowl of water and a bowl of honey.
Why does the water get trapped in the chalk?
chalk has a greater density than water ans also chalk has a low surface tension
Does gasoline have a low surface tension?
yes it is lower than the surface tension of water
How does surface tension of water compare with the surface tension of most other liquid?
The surface tension of water is higher than that of most other liquids. Water has a surface tension of 7.29 * 10-2 J/m2 at 20oC.
Does water have a relatively high or low surface tension?
MERCURY has a higher surface tension than water. This highest surface tension between liquids is 487 mN/m at 15 0C.
Why needle with grease float on water surface?
Surface tension. Translated that means that the attraction between the water molecules (to each other) is greater than the force (gravity) pushing the needle down.
Why does the pin rest on the surface of the water when it denser than the water?
This is called surface tension.
Why can a sewing needle can float on the surface water in a glass?
Yes if the surface tension of the water is not broken. If you are careful you can place a needle on the surface of the water in a glass. Also if you reduce the surface tension with detergent (just a very little is enough) the needle will sink because it's density is greater than that of the water. NO (if the surface tension of the water is broken, a needle cannot float on the surface of water. This is because the needle has higher density than water (density is mass divided by volume).
What makes some liquids have a greater surface tension than others?
The surface tension is primarily due to the arrangement of electrons of the molecules that comprise the liquid.
How does the surface tension of water compare with the tensions of most other liquids?
The surface tension of water is higher than that of most other liquids. Water has a surface tension of 7.29 * 10-2 J/m2 at 20oC.
