Why the needle of iron swims on water surface when it is kept gently? (1) It will remain under the water, when it will displace more water than its weight (2) the density of needle is less than that of water (3) due to surface tension (4) due to its shape

Why the needle of iron swims on water surface when it is kept gently? (1) It will remain under the water, when it will displace more water than its weight (2) the density of needle is less than that of water (3) due to surface tension (4) due to its shape
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(3) due to surface tension Explanation: According to Archimedes principle and we can note that the amount of water displaced by a needle is lesser than the amount of water moved out by the needle (that is displacement of the needle). So the needle initially stays on the surface of the water and then sinks into the water. Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force.
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Why the needle of iron swims on water surface when it is kept gently ? (1) It will remain under the water, when it will displace more water than its weight (2) the density of needle is less than that of water (3) due to surface tension (4) due to its shape

Description : Why the needle of iron swims on water surface when it is kept gently ? (1) It will remain under the water, when it will displace more water than its weight (2) the density of needle is less than that of water (3) due to surface tension (4) due to its shape

Last Answer : due to surface tension

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Fan Gently If you run What? Electricity Cost Less Is it

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Description : The hair of shaving brush clings together when removed from water due to – (1) Surface tension (2) Viscosity (3) Elasticity (4) Friction

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Last Answer : Ans:(a)

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Description : While Young's modulus ‘E’ relates to change in length and bulk modulus ‘K’ relates to change in volume, modulus of rigidity ‘G’ relates to change in: A. weight B. density C. shape D. temperature

Last Answer : . shape

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Last Answer : (D) Surface tension

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Description : A solid needle placed horizontally on the surface of the water floats due to?

Last Answer : Surface tension of water

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Stars in the sky appear to twinkle due to – (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

Description : Stars in the sky appear to twinkle due to – (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

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Stars in the sky appear to twinkle due to (1) a series of refractions (2) a series of reflections (3) a surface tension phenomenon (4) multiple diminishing brightness

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Last Answer : a series of refractions

Surface tension in a liquid is due to : (1) Adhesive force between molecules (2) Cohesive force between molecules (3) Gravitational force between molecules (4) Electrical force between molecules.

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Dhanvanth can swim at 15 km/hr in stagnant water. In a river with 3 km/hr current, he swims to a certain distance and comes back within 100 min. What is the distance between the two points? A) 11km B) 13km C) 19km D) 12km

Description : Dhanvanth can swim at 15 km/hr in stagnant water. In a river with 3 km/hr current, he swims to a certain distance and comes back within 100 min. What is the distance between the two points? A) 11km B) 13km C) 19km D) 12km

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Last Answer : ANSWER: Y -- SURFACE TENSION

A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will - (1) increase (2) decrease (3) remain unaffected (4) have its shape changed

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Last Answer : (1) increase Explanation: The metal ball can be considered to be made up of several layers of thinner ones. On heating each of these layers will increase in radius.

A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will - (1) Increase (2) decrease (3) remain unaffected (4) have its shape changed

Description : A solid ball of metal has a spherical cavity inside it. When the ball is heated the volume of the cavity will - (1) Increase (2) decrease (3) remain unaffected (4) have its shape changed

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Why do people do polar bear swims?

Description : Why do people do polar bear swims?

Last Answer : I would assume it’s for the adrenaline rush. Me, however, I’d probably wimp out.

What does it mean when a gold fish sits on the bottom of the tank and only swims around when it is time to eat?

Description : What does it mean when a gold fish sits on the bottom of the tank and only swims around when it is time to eat?

Last Answer : He could just be ill. Just take care of him as you usually do. Get the water tested see if anything could be causing the illness. I’ve seen it happen to fish before they’ll just snap out of it an get back to normal.

There is a frog, dead in the middle of an island. If he swims north, the distance to the mainland is 2 meters. If he swims south, the distance to the mainland is 3 meters. If he swims east or west, the distance is 4 meters. Which way does he swim? -Riddles

Description : There is a frog, dead in the middle of an island. If he swims north, the distance to the mainland is 2 meters. If he swims south, the distance to the mainland is 3 meters. If he swims east or west, the distance is 4 meters. Which way does he swim? -Riddles

Last Answer : He doesn't swim at all, he is dead.