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Assertion : A thin staindess steel needl...

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

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
C
Upward component of force due to surface tension and upthrust balances the weight.
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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.

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.

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?

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.

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.

Surface tension is the property of a liquid by virtue of which the free space of the liquid at rest tends to have minimum area and as such it behaves as if covered with a stretched membrane. It is measured as the force acting an unit length of a line imagined to be drawn tangentially anywhere on the free surface of liquid at rest. It acts at right angles to this line on both sides and along the tangent to the liquid surface. When a razor bladed floats on water, then the force of surface tension acts on the circumference of the blade acting tangentially to the liquid surface : (a) True (b) False

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