Mirage is due to

A) unequal heating of different parts of the atmosphere
B) magnetic disturbances in the atmosphere
C) depletion of ozone layer in the atmosphere
D) equal heating of different parts of the atmosphere

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Find the maximum velocity for the overturn of a car moving on a circular track of radius 100 m. The co-efficient of friction between the road and tyre is 0.2

A) 0.14 m/s
B) 140 m/s
C) 1.4 km/s
D) 14 m/s

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Pa(Pascal) is the unit for

A) thrust
B) pressure
C) frequency
D) conductivity

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Siphon will fail to work if

A) the densities of the liquid in the two vessels are equal
B) the level of the liquid in the two vessels are at the same height
C) both its limbs are of unequal length
D) the temperature of the liquids in the two vessels are the same

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Light from the Sun reaches us in nearly

A) 2 minutes
B) 4 minutes
C) 8 minutes
D) 16 minutes

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