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Across 4. Who came up with, "the bouyant force on a body is equal to the weight of fluid displaced" 5. No change to a flow over a specified region 6. The result of putting dye into a flow 7. disordered flow 10. High velocity causing pressure drop and vapourisation 12. viscosity not dependant on pressure 13. A measure of a fluid's resistance to deformation 16. the actual path travelled by a particle 17. Who created the law concerning permeability 18. A set of adjacent fluid particles that were marked at the same instant in time 20. losses due to friction 21. Pressure below atmospheric

Down 1. In what way do tension forces act relative to the surface 2. Ability of a medium to permit flow 3. losses due to bends, valves e.t.c 6. Curve tangential to the instantaneous velocity 8. Fluid cannot cross it's boundaries by definition 9. Flow where viscous forces are negligible 11. What effect is the rise or fall of a liquid in narrow tubes 14. the curved free surface of a liquid in a capillary tube 15. Ordered flow 16. Fraction of volume with empty space 19. pressure relative to atmosphere