Question

a) Water (Densitywater = 1,000 kg/m3) flows through a pipe that narrows. At point A it is determined that the water flows with a velocity of VA = 93 m/s. At point B it is determined that the water flows with a velocity of VB = 193 m/s.What is the nagnitude of the difference in pressure between points A and B.

b)

Two trains pass each other. Train A is traveling 36 m/s east. Train B is traveling 23 m/s west. After the trains pass each other train A blows its whistle with a frequency of 578 Hz. What frequency does a person on train B hear? Assume 342 m/s as the speed of sound.

c) When a 0.427 kg mass is hung from a certain spring it stretches 0.155 m to its equilibrium position at a point P. If this mass is pulled down 0.11 m from point P and released, what is the magnitude of the maximum acceleration of the mass in m/s²?

d) A pipe with an internal diameter of 2.54 2.66 cm attaches to a hose with an internal diameter of 1.11 1.257 cm. It is determined that water flows through the pipe with a velocity of 0.755 0.803 m/s. With what velocity does the water flow through the hose?

Answer 1