EASY
AP EAPCET
IMPORTANT
Earn 100

Assertion (A): The upper surface of the wing of an aeroplane is made convex and the lower surface is made concave.
Reason (R): The air currents at the top have smaller velocity and thus less pressure at the bottom than at the top.

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Important Questions on Mechanical Properties of Matter

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AP EAPCET
IMPORTANT
What causes the free surface of a liquid to have minimum area?
MEDIUM
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IMPORTANT
A wire of length 1 m and radius 2 mm is vertically clamped. The lower end is twisted through an angle of 45°. The angle of shear is _____
MEDIUM
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IMPORTANT
The lower end of a capillary tube is dipped into water and it is observed that the water in capillary tube rises by 7.5 cm. Find the radius of the capillary tube used, if surface tension of water is 7.5×10-2 N m-1? Angle of contact between water and glass is 0° and acceleration due to gravity is 10 m s-2.
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IMPORTANT
Two capillary tubes of same length each of 50 cm but of different radii 4 mm and 2 mm are connected in series. When water flows, the pressure difference between the ends of the arrangement is P. Then the pressure difference between the ends of the first tube is
EASY
AP EAPCET
IMPORTANT
Identify the incorrect statement regarding Reynold's number Re:
MEDIUM
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IMPORTANT
What is the pressure required to reduce the given volume of water by 1% ? (Bulk modulus K=2×108 N m-2)