The external atmospheric pressure acting on the rubber sucker forces the sucker against the flat surface.

The value of atmospheric pressure on the Earth's surface is .........

If net external force acting on the system is zero then

If the external forces acting on a system have zero resultant, the centre of mass

A solid hemisphere of radius R is made to just sink in a liquid of density rho . Find a. the vertical thrust on the curved surface b. the vertical thrust on the flat surface c. the side thrust on the hemisphere. d. the total hydrostatic force acting on the hemisphere.

The U-tube acts as a water siphon. The bend in the tube is 1m above the water surface. The tube outlet is 7m below the water surface. The water issues from the bottom of the siphon as a free jet at atmospheric pressure. Determine the speed of the free jet and the minimum absolute pressure of the water in the bend. Given atmospheric pressure =1.01xx 10^(5)N//m^(2),g=9.8 m//s^(2) and density of water =10^(3)kg//m^(3) .

50 L of a certain liquid is confined in a piston system at the external pressure 100 atm . This pressure is suddenly released and liquid is expanded against the constant atmospheric pressure, volume of the liquid increases by 1 L and the final pressure on the liquid is 10 atm . Find the workdone.

Is it possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. Explain it with as example.

A body is moved in a direction opposite to the direction of force acting on it.State whether the work is done by the work in done against the force.

If the resultant of all the external forces acting on a system of particles is zero. Then from an inertial frame, one can surely say that

A : Evaporation occurs at any temperature whereas the boiling point depends on the external pressure. R : Evaporation of a liquid occurs from the surface of a liquid at all temperature whereas boiling takes place at a temperature determined by the external pressure.