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A man stands in a lift which accelerates upwards. The resultant reaction force on the floor of the lift is
A man wearing spectacles, when working with a microscope
A man weighing 65 kg jumps from a 100 ft high building with a load of 35 kg. What wlii be the load experienced by him?
A manometer is used to measure
A mass m is pushed up an inclined plane, that makes an angle q with the horizontal as shown in figure. At the top of the inclined plane the speed of the mass is v. If the mass started from rest and the plane is frictionless, the work done is
A medical use thermometer has a kink in its hair tube?
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole
A mirage occurs because of
A mirror produces magnified erect image of an object. The nature of the mirror is