Question

❤️❤️ this question carries 5 marks. class 11 cbse ❤️❤️​

Answer 1

Answer:

Answer (1)

Coefficient of viscosity is the degree to which a fluid resists flow under an applied force. It is expressed as the ratio of the shearing. As the temperature increases the coefficient of viscosity of liquids decreases because the bonds between molecules are weakened.

Answer(2)

Bubbles of air rise up through liquids due to : surface tension and adherence.

... Air current over the liquid and buoyancy. Up thrust and surface tension.

Answer(3)

Terminal velocity is the maximum velocity attainable by an Object as it falls through a fluid ( air is the most common example). It occurs when the sum of the drag force (formula)

$f \frac{}{d}$

and the buoyancy is equal to the downward force of gravity (formula)

$f \frac{ }{g}$

acting on the Object.

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