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A bomb explodes on the moon. You will hear its sound on earth after _
A bomb is dropped at a point from a moving aeroplane. The pilot observes that
A bottle of sodalime is grasped by the neck swung briskly in a vertical circle, Near which portion of the bottle do the bubbles collect -
A car of 500 kg mass travelling at 25 m/sec applies brakes and its speed is reduce to 5 m/sec in 5 sec. Find the force of repulsion ?
A catalyst is a substance which
A closed vessel containing some gas at atmospheric pressure and room temperature is placed in a fast moving train. The temperature of the gas will
A colloidal system in which a liquid is dispersed in a liquid is called
A convex lens and concave lens each having the same focal length of 25 cm, are put in contact to form a combination of lenses. The power (in dioptres) of the combination is :
A convex lens of glass has power P in air. If it is immersed in water its power will be :
A current loop in a magnetic field :
