Hi I'm writing an exam question (about hot air balloons) and need to know the density of air in 15 and 100 degrees Celsius. (Don't have a table at home and I really can't find one …

In three dimensions, the velocity potential around a radially oscillating sphere in an incompressible fluid is 1/r, where r is the radial coordinate, and the velocity is the gradie …

I'm using an accelerometer to record the rate of acceleration of a vehicle over time (1500kg). With this data I am calculating speed and distance traveled over time. I'm now trying …