Question
  1. Do gases usually have a constant specific weight?
  2. 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.
  3. Write down the continuity law for compressible fluids.
  4. Describe the streamlines around a wing-shaped body.
  5. State the three characteristics of each of the following flows
    1. Laminar
    2. Turbulent

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