At a sudden contraction in a pipe the diameter changes fromd1tod2. the pressure drop,δp, which develops across the contraction is a function ofd1andd2, as well as the velocity, v, in the larger pipe, and the fluid density, rho, and viscosity,μ. used1,v, andμas repeating variables to determine a suitable set of dimensionless parameters. why would it be incorrect to include the velocity in the smaller pipe as an additional variable?

Scientist have use computer models to create a series of maps that show how susceptible coastal cities in island countries are to the sea rising at different levels.the map shows that a 1 meter rise would swap cities all along the us eastern seaboard. a 6-meter sea level rise with sub merge a large part of florida. thermal expansion has already raise the oceans 10 to 20 centimeters the most likely cause,directly and indirectly, for such a rise in sea level is