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11. A car of length 3 m in moves at a constant velocity 36 km/hr. A man wants to take a photo of side view of the car. The size of the image of the car is 1.5 cm long. The time of exposure needed for the car to get a clear picture, if the image should not move more than 0.1 mm, is (NTSE Andhra Pradesh, Stage-I, 2015-16)

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12. A spherical iron ball is placed on a large block of dry ice at O°C. The ball sinks into the ice until it is half submerged. Density of iron is 7.7 x 103 kg/m3. Density of ice is 920 kg/m3. Specific heat capacity of iron is 504 J/kg - K and latent heat of fusion of ice is 336 x 103 J/kg. The initial temperature of iron is (NTSE Andhra Pradesh, Stage-I, 2016-17)

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13. In the adjacent V - T diagram what is the relation between pressures P1 and P2?

(NTSE West Bengal, Stage-I, 2015-16)

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14. Two electrodes are maintained at a potential difference of 100 V. An electron moving from cathode to anode gains kinetic energy (NTSE West Bengal, Stage-I, 2015-16)

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15. Fill in the gap
12Mg25 + 1H1 → 11Na22 + _____ (NTSE West Bengal, Stage-I, 2015-16)

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