1. A cylinder tank is 30m deep,calculate the pressure extended at the bottom of the tank,when it is four-fifth filled with water (g=10mg-2,density of water =1000kgm-2) 2.a sample of air weighing 1.32*10^2N is confined in a room measuring 9.5m*2.0m.calculate the density of the sample

Answer 1

1. Pressure at the bottom of the tank = (density of water x gravitational acceleration x depth of tank) = (1000 kg/m^3 x 10 m/s^2 x 30 m) = 3 x 10^5 Pa

2. Density of the sample = (weight of the sample / volume of the room) = (1.32 x 10^2 N / (9.5 m x 2.0 m)) = 7.03 kg/m^3