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the earth has the maximum speed of rotation at the equator
the earth is flat at the poles
the attractive force at the poles increases due to the ice cap
none of these is a complete explanation
A bomb explodes on the Moon. How long will it take for the sound to reach the Earth?
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 :