Do gases usually have a constant specific weight?What increases in altitude is necessary in the stratosphere to halve the pressure? Assume a constant temperature of -56°C and the gas constant, R=287J/Kg/K.Write down the continuity law for compressible fluids.Describe the streamlines around a wing-shaped body.State the three characteristics of each of the following flowsLaminarTurbulent

Do gases usually have a constant specific weight?
What increases in altitude is necessary in the stratosphere to halve the pressure? Assume a constant temperature of -56°C and the gas constant, R=287J/Kg/K.
Write down the continuity law for compressible fluids.
Describe the streamlines around a wing-shaped body.
State the three characteristics of each of the following flows
1. Laminar
2. Turbulent

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