Fluids 101. Chapter 10. Fluids. Any material that flows and offers little resistance to changing its shape. Liquids Gases Plasma?. Density. An important property of matter is density. Density is defined as mass per unit volume. The symbol is . Density of water. 1.0 g/ml
1.01x105 Pa or 101 kPa
Pressure = density x depth
When you are under water the water’s pressure pushes in on you from all sides. The force is perpendicular to your body.
- this stands for the initial pressure.
P = (1000 kg/m3)(9.8 m/s2)(45 m)
P = 4.41 x105 Pa or441 kPa
FB = (1000kg/m3)(0.05 m)3(9.8m/s2)
FB = 1.23 N
a m = ρV
FW = (9.0 x 103 kg/m3)(0.05 m)3(9.8m/s2)
FA = W – FB
FA = 11.03 N – 1.23 N = 9.8 N
“Bob, do you think I’m sinking? Be honest”