Why Are Drops Of Water Shaped Like Spheres

Why Are Drops Of Water Shaped Like Spheres?

Raindrops start to form in a roughly spherical structure due to the surface tension of water. This surface tension is the “skin” of a body of water that makes the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.

Why is a water drop spherical in shape?

“This remarkable evolution results from a tug-of-war between two forces: the surface tension of the water and the pressure of the air pushing up against the bottom of the drop as it falls. When the drop is small surface tension wins and pulls the drop into a spherical shape.

Why are water drops and bubbles spherical?

A sphere has the minimum surface area of all shapes that enclose a given volume. So the surface tension tends to minimize the surface area and to compensate it the molecules group together to form the best possible shape for the situation which is a sphere. Thus the bubbles are spherical in shape.

Why small drops of mercury are spherical and large drops become flat?

The effect of gravity is less for small droplets hence the mercury drops are nearly spherical in shape. As the size of drop increases force of gravity on the drop increases which tries to deform the shape. Therefore bigger drops are flat.

Why does rain drop downwards?

Gravity pulls everything downward. As an object falls it experiences a frictional drag that counters the downward force of gravity. … You will not find a raindrop any bigger than about one-quarter of an inch in diameter larger than that the drop will break apart into smaller drops because of the air resistance.

Which property of liquid is responsible for spherical shape of drop?

surface tension

In case of liquids attractive force of surface tension causes drops to take spherical shape. Because the sphere has the smallest surface area and surface tension tends to minimize the surface area. Due to this reason the shape of liquid drop is spherical.

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What explanation can you give for the shape of water drops?

Surface tension is responsible for the shape of liquid droplets. Although easily deformed droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer. In the absence of other forces including gravity drops of virtually all liquids would be approximately spherical.

Why a mercury drop is spherical?

Ans: Due to surface tension. Surface tension is the property of liquid due to which it tries to aquire minimum surface area. Since for a given volume sphere has a minimum surface area a mercury droplet is spherical.

Why is mercury spherical in shape?

The molecules in the bulk of mercury are pulled equally in all directions by the neighboring molecules. But the surface molecules do not have molecules on all sides. Hence they are pulled inwards causing the liquid to shrink to form a surface with minimum area a sphere. Hence mercury droplets are spherical.

Why is a small drop of mercury spherical in shape?

In a small drop the force due to surface tension is very large as compared to its weight and hence it is spherical in shape. A big drop becomes oval in shape due to its large weight. The surface tension of liquid decreases with increase of temperature.

What is the shape of the drop?

spherical

Since a sphere has got the minimum surface-to-volume ratio falling liquid drops are always spherical in shape.

Why is the shape of the droplets differ?

The drop tries to minimize its surface energy and balance this capillary pressure by converting into a spherical shape. … While a prolate shaped drop tends to become spherical to minimize its surface energy the fluid inertia converts it into an oblate …

At what speed does a raindrop fall?

When all the parameters are considered the terminal velocity of a typical raindrop is calculated to be about 9 meters per second or 20 mph. A smaller raindrop of radius 0.15 cm has a terminal velocity of about 7 meters per second or 16 mph.

Which one of the following phenomenon is responsible spherical shape of a rain drop?

Raindrops start to form in a roughly spherical structure due to the surface tension of water. This surface tension is the “skin” of a body of water that makes the molecules stick together. The cause is the weak hydrogen bonds that occur between water molecules.

Which property is responsible for the spherical shape of mercury drops?

The property responsible for spherical shape of drops of liquid like Mercury is surface tension. Explanation: It is the force acting per unit length perpendicular to the line drawn on surface of liquid. It is inversely proportional to temperature.

Which of the following forces are stronger in liquid responsible for formation of sphere shape?

cohesive forces

If the adhesive forces between a liquid and a surface are stronger they will pull the liquid down causing it to wet the surface. However if the cohesive forces among the liquid itself are stronger they will resist such adhesion and cause the liquid to retain a spherical shape and bead the surface.

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Why are water droplets spherical quizlet?

Why are water droplets spherical? They are spherical because of the surface tension caused by the attractive forces. Intermolecular forces pull water inward to form a sphere. The sphere minimizes the surface area to volume ratio thereby minimizing the number of molecules at the surface.

Why do water drops stay together on wax paper?

Why do water drops stay together on wax paper and don’t break apart easily? Water molecules are attracted to each other. … because the molecules of the liquid move faster and get a little further apart.

Why does mercury bead up into spheres so readily?

Question: Why does mercury bead up into spheres so readily? … Mercury has extremely high cohesion and surface tension due to its strong metallic bondsb. Mercury has extremely high cohesion and surface tension due to its strong dispersion forcesc. Since mercury is a liquid it is not able to make metallic bonds.

What flattens the large sized liquid drops?

The curved surface of a fluid in a tube is called a meniscus. The tendency of surface tension is always to reduce the surface area. Surface tension thus flattens the curved liquid surface in a capillary tube.

Why water sticks to glass but mercury does not why?

Answer: When liquid water is confined in a tube its surface (meniscus) has a concave shape because water wets the surface and creeps up the side. Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass.

When mercury is dropped it breaks into numerous droplets Unlike water drops give reason?

It is due to large cohesive force acting between the moleculeas of mercury that the droplets of mercury when brought in contact pulled together to form a bigger drop in order to make potential energy minimum. The temperature of this bigger drop icreases since the total surface area decreases.

When a small drop of mercury is poured on a glass top it takes the shape of a spherical ball the reason is?

Mercury does not wet glass – the cohesive forces within the drops are stronger than the adhesive forces between the drops and glass. When liquid mercury is confined in a tube its surface (meniscus) has a convex shape because the cohesive forces in liquid mercury tend to draw it into a drop.

What is the surface tension of mercury?

Abstract. Consistent values for the surface tension of mercury in a high vacuum (air pressure less than 1.2×10−5 mm Hg throughout the period of experimentation) ranging from 438.4±0.3 dynes per cm at 12.5°C to 423.9±0.6 dynes per cm at 67°C have been found by a modified flat-drop method.

What force holds the drops of water?

Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets. Although easily deformed droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer.

When a drop of water splits up is to number of drops?

When a drop spilts up into no. of drops then surface area increases volume remains constant. In this process energy is absobed.

Why is knowing the actual shape of raindrops important?

Analyzing the shape of raindrops can give scientists insight into global rainfall patterns. For example heavier flatter drops mean heavier rainfall.

Why raindrops are not spherical and have a teardrop shape instead?

Raindrops are not tear shaped when falling through the air. They are approximately round. … But the air resistance instead just flattens the front of the drop. The smaller the rain drop the smaller the effect of air resistance and the more spherical the raindrop becomes.

What is water droplet?

A drop or droplet is a small column of liquid bounded completely or almost completely by free surfaces. … Drops may also be formed by the condensation of a vapor or by atomization of a larger mass of solid.

Why do raindrops not hurt?

The velocity of a raindrop do not increases continuously as it falls instead it achieves a terminal speed (it falls through a fluid that is air) and it cannot fall faster than it and the mass of individual raindrop is very small. A great part of its potential energy is lost by air friction.

What is the fastest recorded raindrop?

The droplets in a light shower are 100 times larger and fall at 6.5m/s or about 22.5km/h (14mph). The largest possible raindrops are 5mm across and hit the ground at 32km/h (20mph).

How hard does rain hit the ground?

In still air the terminal speed of a raindrop is an increasing function of the size of the drop reaching a maximum of about 10 meters per second (20 knots) for the largest drops. To reach the ground from say 4000 meters up such a raindrop will take at least 400 seconds or about seven minutes.

Why do water molecules have high cohesion?

Cohesion refers to the attraction of molecules for other molecules of the same kind and water molecules have strong cohesive forces thanks to their ability to form hydrogen bonds with one another. … Thus the water molecules at the surface form stronger interactions with the neighbors they do have.

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Why does water adhere to surfaces?

Water is very adhesive it sticks well to a variety of different substances. Water sticks to other things for the same reason it sticks to itself – because it is polar so it is attracted to substances that have charges. … In each of these cases water adheres to or wets something because of adhesion.

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