The contrabassoon is the wind instrument capable of sounding the lowest pitch in an orchestra. it is folded over several times to fit its impressive 18 ft length into a reasonable size instrument. the actual fundamental frequency of the contrabassoon is 27.5 hz , which should be different from your answer in part a. this means the model of the instrument as an open-closed tube is a bit too simple. but if you insist on using that model, what is the "effective length" of the instrument?

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?