Question

1. Explain why materials with equal volumes will not necessarily have equal masses. Use an example in your explanation.


2. Explain the difference between adhesion and cohesion and give an example of each?


3. Explain the general relationship between viscosity, density and buoyancy?

Answer 1

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$here \: is \: your \: answer$

1) Equal masses of different substances have different volumes. For example, the volume of cotton is much larger than the volume of an equal mass of lead. This is because the particles of lead are closely packed while those of the cotton are very loosely packed. ... Equal volumes of different substances have different masses.

2) As for the definitions, the tendency of two or more different molecules to bond with each other is known as Adhesion, whereas the force of attraction between the same molecules is known as Cohesion. ... When a glass surface is poured with water, both adhesive and the cohesive forces act on the surface of the water.

3) here is no direct relation between viscosity and density. However, both Viscosity and density are affected by temperature. ... In general, for any fluids, when the temperature is increased, its density decreases, thus the fluid becomes less viscous.

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