Physics-
General
Easy

Question

A cup of tea on a metal table in a room loses heat by ....

  1. Conduction    
  2. Convection    
  3. Radiation    
  4. All    

The correct answer is: All

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Which of the following is the incorrect graph for a sphere falling in a viscous liquid? (Given at t = 0, velocity v = 0 and displacement x = 0.)

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Equal volumes of two immiscible liquids of densities r and 2r are filled in a vessel as shown in figure. Two small holes are punched at depth h/ 2 and 3h/2 from the surface of lighter liquid. If v subscript 1 end subscript text  and  end text v subscript 2 end subscript are the velocities of a flux at these two holes, then v subscript 1 end subscript divided by v subscript 2 end subscript text end text text is : end text

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In a cylindrical vessel containing liquid of density rho, there are two holes in the side walls at heights of h subscript 1 end subscript text  and  end text h subscript 2 end subscript respectively such that the range of efflux at the bottom of the vessel is same. The height of a hole, for which the range of efflux would be maximum, will be

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A body having volume V and density rho is attached to the bottom of a container as shown. Density of the liquid is d left parenthesis greater than rho right parenthesis. Container has a constant upward acceleration a. Tension in the string is

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