Why Do Glass Plates with Water Not Separate Under Weight but Slide Easily?

In summary, the conversation discusses two observations made while experimenting with two glass plates with water trapped in them. The first observation is about the plates not separating until weights of 2-3 kg were applied, which is caused by surface tension due to intermolecular forces. The second observation is about the plates sliding easily, which is explained by the liquid film reducing friction.
  • #1
Himal kharel
79
0
1. I took two glass plates with a thin film of water trapped in it. One of plates had hook in it. Weights were hung in it. I found that these plates didn't separate until weights of about 2-3 kg was applied.
2.But if slided, it moved easily.
I can explain observation no. 2. It is because the liquid film reduces friction.
Can anyone explain observation no. 1?
 
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  • #2
The first case is due to surface tension.a situation which is caused due to the intermolecular forces such as adhesive and cohesive forces.It is responsible for holding the water or any other.another example is the capillary action
 

Related to Why Do Glass Plates with Water Not Separate Under Weight but Slide Easily?

1. What is the phenomenon of liquid trapped in two plates?

Liquid trapped in two plates, also known as capillary action, is a phenomenon where a liquid is drawn into a narrow space, such as the space between two plates, due to the adhesive and cohesive forces of the liquid.

2. What causes liquid to be trapped between two plates?

The liquid is trapped between two plates due to the adhesive forces between the liquid and the surface of the plates. This causes the liquid to rise in the narrow space between the plates, creating a meniscus.

3. How does the distance between the two plates affect the amount of liquid trapped?

The distance between the two plates affects the amount of liquid trapped because the narrower the space, the greater the adhesive forces between the liquid and the plates. This results in a greater amount of liquid being drawn into the space.

4. Can different liquids be trapped between two plates?

Yes, different liquids can be trapped between two plates as long as they have adhesive properties. However, the amount of liquid trapped may vary depending on the surface tension and viscosity of the liquid.

5. What are the practical applications of liquid trapped in two plates?

The phenomenon of liquid trapped in two plates has many practical applications, such as in microfluidic devices, inkjet printers, and lab-on-a-chip technology. It is also used in paper chromatography, where the different components of a liquid mixture are separated based on their different rates of capillary action.

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