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Why does water drop spread on glass surface while mercury does not?
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∙ 12y ago
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Why the surface of the mercury in a glass tube is con vex end that of water concave?
Mercury has a low adhesive force to glass, it would rather bond to itself than another surface. This tends to create a spherical surface on open mercuric faces. Balanced by gravity the hemisphere flattens and creates the slight convex shape observed.
Why can a sewing needle can float on the surface of water in a glass.?
Surface tension
Why does a glass tumbler crack when you suddenly pour hot tea into it?
When we pour very hot water into an empty glass, the inner surface of the glass will expand as matter expands when heated. But the inner surface of the glass will expand more than the outer surface of the glass because more heat is applied to the inner surface of the glass.
Why does a mercury-in glass thermometer first drop slightly when placed in boiling water?
When placed in boiling water, the materials comprising the thermometer respond in the order in which the heat penetrates them. As the heat first permeates the glass cylinder, the cylinder expands, enlarging the bore. For the moment until the mercury is also heated, the constant volume of mercury fills the expanded bore to a slightly lower depth. When the heat reaches the mercury and it also expands, its volume to increase, and the liquid depth rises in the bore.
Does Water evaporate faster in a wide glass or narrow glass?
A tall, skinny glass will freeze water faster than a short, wide glass.This is because the tall glass allows convection (cold particles in the air to transfer cold to the water particles in the glass) to take place between more particles at once due to a tall glass having a larger surface area.
Can mercury wet a substance?
Mercury is a metal unlike water which have hydrogen bonding. Mercury does not wet most substances, because of its high cohesion and low adhesion to the glass mercury will not wet glass. Cohesion, along with adhesion(attraction between unlike molecules), can help explain mercury phenomena. Mercury has a surface energy over 6 times greater than that of water so there is a much greater attractive force between the atoms of mercury than between the molecules of water, so mercury does not wet glass.
Why the surface of the mercury in a glass tube is con vex end that of water concave?
Mercury has a low adhesive force to glass, it would rather bond to itself than another surface. This tends to create a spherical surface on open mercuric faces. Balanced by gravity the hemisphere flattens and creates the slight convex shape observed.
Does water or Mercury have greater surface tension?
mercury
What liquid is not wet?
The "wetting" that happens when an object is immersed in a liquid depends on the surface energy of the object and the capilary forces in action on the surface of the liquid. for example mercury will not "wet" glass but water can wet the same glass.
Why does a piece of glass float in mercury but sinks in water?
B/c the density of mercury is higher than that of glass, while the density of water is lower than that of water.
What would be least conductive cooper salt water glass or mercury?
Glass
Why does water wet glass and mercury does not?
Water wets glass because the force of adhesion between the glass molecules and water molecules is greater than the force of cohesion between the water molecules and glass molecules. Mercury does not wet glass because the force of cohesion is greater than the force of adhesion
Is the curve at a liquids surface by which you measure the volume of a liquid?
The meniscus is the curve at a liquid's surface by which one measures the volume of the liquid. A meniscus can be concave or convex depending on whether it is attracted to itself or the glass.
Does water have the highest surface tension?
No, mercury has a higher surface tension.
Why can a sewing needle can float on the surface of water in glass?
Surface tension
Why can a sewing needle can float on the surface of water in a glass.?
Surface tension
Which gas evolved in tailing of mercury?
when mercury is reacted with ozone it loses its meniscus and sticks to the surface of the glass. This is basically due to the formation of mercurous oxide. Hg + O3 GIVES Hg2O + O2 OXYGEN GAS IS LIBERATED This can be removed by washing it with water, as it is soluble in water
