1. the tank in below filled with water 2.oo m deep. at the

bottom of one side wall is a rectangular hatch 1.00 m high and 2.00 m wide ,
which is hinged at the top of the hatch.

(a) determine the force the water exerts on the hatch

b) find the torque exerted by the water about the hinges 

 2.   A piece of
aluminium with mass 1.00 kg and density 2700 kg/m3 is suspended from a string
and then completely immersed in a container of water . calculate the tension in
the string  (a)  before and (b) after the metal is immersed 

 3. a siphon is used to drain water from a tank , as
illustrated  in figure .the siphon has a
uniform diameter. assume steady flow without friction.  (a) if the distance h= 1.oo m ,find the speed
of outflow at the end of the siphon . (b) what if? what is  limitation on the height of the top of the
siphon above the water surface ?

 (for the flow of the
liquid to be continuous , the pressure must not drop below the vapor pressure
of the liquid.)

1. the tank in below filled with water 2.oo m deep. at the