AIPMT 2015 Cancelled Paper | Properties of Matter Question 46 | Physics

A wind with speed 40 m/s blows parallel to the roof of a house. The area of the roof is 250 m². Assuming that the pressure inside the house is atmospheric pressure, the force exerted by the wind on the roof and the direction of the force will be $$({\rho _{air}} = 1.2kg/{m^3})$$

2.4 $$ \times $$ 10⁵ N, upwards

2.4 $$ \times $$ 10⁵ N, downwards

4.8 $$ \times $$ 10⁵ N, downwards

4.8 $$ \times $$ 10⁵ N, upwards

AIPMT 2015 Cancelled Paper

MCQ (Single Correct Answer)

-1

The two ends of a metal rod are maintained at temperatures 100^oC and 110^oC. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200^oC and 210^oC, the rate of heat flow will be

8.0 J/s

4.0 J/s

44.0 J/s

16.8 J/s

AIPMT 2014

MCQ (Single Correct Answer)

-1

A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

energy = 4VT $$\left( {{1 \over r} - {1 \over R}} \right)$$ is released.

energy = 3VT$$\left( {{1 \over r} + {1 \over R}} \right)$$ is absorbed.

energy = 3VT$$\left( {{1 \over r} - {1 \over R}} \right)$$ is released

energy is neither released nor absorbed.

AIPMT 2014

MCQ (Single Correct Answer)

-1

Steam at 100^oC is passed into 20 g of water at 10^oC. When water acquires a temperature of 80^oC, the mass of water present will be
[Take specific heat of water = 1 cal g^$$-$$1 ^oC^$$-$$1 and latent heat of steam = 540 cal g^$$-$$1]

24 g

31.5 g

42.5 g

22.5 g

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