I have many questions.
Why do liquids when thrown spread and then stop after sometime?
Why are liquids able to float?
How can you justify that rate of diffusion is more in liquids than solids?
I have many questions.
Why do liquids when thrown spread and then stop after sometime?
Why are liquids able to float?
How can you justify that rate of diffusion is more in liquids than solids?
1) (Inside Science) -- If you poured a glass of water on a table, you would expect to get a puddle that spreads for a while and then stops. However, until now, the formulas that scientists used to describe the flow of fluids suggested the puddle should never stop spreading.
Now researchers have solved the mystery of why such a puddle would not keep spreading endlessly — the culprit is a force that acts on microscopic scales. This solution to such a simple everyday phenomenon could have far-reaching ramifications for everything from improving advanced electronics to fighting climate change.
Consider the way a spilled liquid spreads across a kitchen counter. It produces a thin, but visible, depth of liquid on the surface. In the classic model of spreading liquids, the size of the puddle depends on the competition between gravity and surface tension. Gravity pulls liquids down against surfaces, making puddles grow larger and thinner, and surface tension makes drops of liquid want to bead up into the most compact shapes possible and stop spreading. Surface tension results from how tightly the molecules in liquids stick to one another as opposed to something else, making the surfaces of liquids act like flexible membranes that can be surprisingly strong — for instance, the surface tension of water is great enough to support the weight of an insect such as a water strider.
2)We can only say less dense liquids float on more dense liquids due to differnece in density Sample questions:
Why does the alcohol float on the oil? They should conclude that the alcohol floats because it is less dense than the oil. Why does the water sink in the oil? Water sinks because it is more dense than oil. Explain that, just like solids, liquids are made from atoms and molecules, which have a certain mass and size. Depending on the mass of the molecules that make up a liquid and how closely they pack together, liquids have their own densities
3) Matter is defined as any substance that has mass and , occupies volume. Liquids havehigher rate of diffusion than that of solid. This is because liquids have more inter molecular space between their . Whereas , on the other hand , there is less inter molecular space between the particles of a solid.
(Inside Science) -- If you poured a glass of water on a table, you would expect to get a puddle that spreads for a while and then stops. However, until now, the formulas that scientists used to describe the flow of fluids suggested the puddle should never stop spreading.
Now researchers have solved the mystery of why such a puddle would not keep spreading endlessly — the culprit is a force that acts on microscopic scales. This solution to such a simple everyday phenomenon could have far-reaching ramifications for everything from improving advanced electronics to fighting climate change.
Consider the way a spilled liquid spreads across a kitchen counter. It produces a thin, but visible, depth of liquid on the surface. In the classic model of spreading liquids, the size of the puddle depends on the competition between gravity and surface tension. Gravity pulls liquids down against surfaces, making puddles grow larger and thinner, and surface tension makes drops of liquid want to bead up into the most compact shapes possible and stop spreading. Surface tension results from how tightly the molecules in liquids stick to one another as opposed to something else, making the surfaces of liquids act like flexible membranes that can be surprisingly strong — for instance, the surface tension of water is great enough to support the weight of an insect such as a water strider.
2)We can only say less dense liquids float on more dense liquids due to differnece in density Sample questions:Why does the alcohol float on the oil? They should conclude that the alcohol floats because it is less dense than the oil. Why does the water sink in the oil? Water sinks because it is more dense than oil. Explain that, just like solids, liquids are made from atoms and molecules, which have a certain mass and size. Depending on the mass of the molecules that make up a liquid and how closely they pack together, liquids have their own densities
3) Matter is defined as any substance that has mass and , occupies volume. Liquids havehigher rate of diffusion than that of solid. This is because liquids have more inter molecular space between their . Whereas , on the other hand , there is less inter molecular space between the particles of a solid.
