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Statement-1: A thin stainless steel need...

Statement-1: A thin stainless steel needle can lay floating on a still water surface.
Statement-2: Any object floats when the buoyancy force balances the weight of the object.

A

Statement-1, is true, Statement-2 is true, Statement-2 is correct explanation for statement-1

B

Statement-1 is true, statement-2 is true, statement-2 is NOT a correct explantion for statement-1

C

statement-1 is true, statement-2 is false

D

statement-1 is false statement-2 is true

Text Solution

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The correct Answer is:
C
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These questions consist two statements each, printed as Assertion and reason, while answering these question you are required to choose any one of the following four responsis: (a) If both the assertion and reason are true and reason is a true explanation of the assertion. (b) If both the assertion and reason are true but the reason is not the correct explanation of assertion. (c ) If the assertion is true but reason is false. (d) If both the assertion and reason are false. Q. Assertion: A thin stainless steel needle can lay floating on a still water surface. Reason: Any object floats when the buoyance force balances the weight of the object.

Assertion : A thin staindess steel needle can by floating on a still water surface Reason : Any object floats when the bayancey force balace the weight of the object

A : The spiders and insects can run on the surface of water. R : Buoyant force balances the weight of insects.

Two needles are floating on the surface of water. A hot needle when touches wate 3r surface between the needles then they move

Whi does an object float or sink when placed on the surface of water?

An object of weight W has a uniform rectangular cross section of a x2a and density of 0.25g//cm^(3) part of it is immersed in water and the rectangle is tilted by 45^(underset(-)(@)) while one of its corners is just at the water surface find the torque of the buoyancy force to the centre of mass of the object.

Assertion: A needle placed carefully on the surface of water may float. Reason: A needle placed carefully on the surface of water may float due to the surface tension as upward forces due to surface tension balances the weight of the needle.

ALLEN-ELASTICITY, SURFACE TENSION AND FLUID MECHANICS-Exercise 3 (Assertion & Reason)
  1. Statement-1: In gravity free space, the liqid in a capillary tube will...

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  2. Statement-1: It is better to wash the clothes in cold soap solution. ...

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  3. Statement-1: A gas filled balloon stops rising after it has attained a...

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  4. Statement-1: A parachute descends slowly whereas a stone dropped from ...

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  5. Statement-1: hot soup tastes better than the cold soup. Statement-2:...

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  6. Statement-1: Roofs of buildings are blown off during a strong storm. ...

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  7. Statement-1: The stream of water emerging from a wate tap "necks down"...

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  8. Statement-1: As wind flows left to right and a ball is spined as shown...

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  9. Statement-1: A block is immersed in a liquid inside a beaker which is ...

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  10. Statement-1: An ice cube is floating in water in a vessel at 0^(@)C wh...

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  11. Statement-1: Leaves and small insects float on the surface of water bu...

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  12. Statement-1: Weight of a empty balloon measured in air is w(1). If air...

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  13. Statement-1: The stretching of a coil is determined by its shear modul...

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  14. Assertion : At critical temperature, surface tension of liquids become...

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  15. Statement -1 : A large soap bubble expands while a small bubble shrink...

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  16. Statement-1: The size of a hydrogen increases as it rises in air. St...

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  17. Statement I: Smaller drops of liquid resist deforming forces better th...

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  18. Assertion : Specific gravity of a fluid is a dimensionless quantity. ...

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  19. Statement-1: For reynold number R(e)gt2000 the flow of fluid is turbul...

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  20. Statement-1: A thin stainless steel needle can lay floating on a still...

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