As a general rule all engineering equations should be dimensionally correct, meaning the units on both sides of the equation are the same. Occasionally you may come across equations that appear to be dimensionally incorrect. Generally this means that some number in the equation implicitly has units. For example, the FAA Pilots Handbook of Aeronautical Knowledge https://www.faa.gov/regulations_policies/handbooks… in Chapter 11, page 14 gives the following equation to estimate the speed at which an airplane wheel on a runway begins to hydroplane:
?ℎ in nautical miles/hour=9×√ Tire pressure in psi
In this case the number 9 implicitly has the units (nautical miles/hour)/ √psi .
Write out the right-hand side of the above equation as code for a tire pressure of 49 psi, giving proper units to 9 and the tire pressure. You can represent the square root as a power (** operator) of 0.5.
Then print out the result in units of meters per second (ur.m/ur.s), nautical miles per hour (ur.knot), and parsecs per millenium (ur.parsec/ur.millenium)