Consider the general form of the reynolds transport theorem (rtt) dbsysdt=ddt∫cvrhobdv+∫csrhobv→r⋅n→d a . let bsys be the linear momentum mv→ of a system of fluid particles. we know that for a system, newton’s second law is ∑f→=ma→=mdv→dt=ddt(mv→sys) . use the rtt and newton’s second law to derive, and choose the correct linear momentum equation for a control volume.

1point) a skydiver weighing 130 lb (including equipment) falls vertically downward from an altitude of 14,000 ft and opens the parachute after 20 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.85|v|0.85|v| when the parachute is closed and is of magnitude 17|v|17|v| when the parachute is open, where the velocity vv is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. find the speed of the skydiver when the parachute opens. speed is 150.6121788 ft/s find the skydiver's height when the parachute opens. height is 2338.98591 ft find the limiting velocity vlvl after the parachute opens. (think about whether this should be positive or negative.) vl=vl= 7.647 ft/s

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

How do we measure or think of speed in the united states?