Q 99

A pressurized cylindrical tank,5.0 m in diameter,contains water that emerges from the pipe at point C with a speed of
As shown in the figure.Point A is 10 m above point B and point C is 3.0 m above point B.The area of the pipe at point B is
And the pipe narrows to an area of
At point C.Assume that the water is an ideal fluid in laminar flow.The density of water is 1000 kg/m^{3}.The rate at which the water level is falling in the tank is closest to
A)300 mm/s.
B)340 mm/s.
C)250 mm/s.
D)210 mm/s.
E)160 mm/s.

Q 100

Glycerin,with a viscosity of 1.5 N ∙ s/m^{2},is flowing with an average speed of 1.2 m/s through a tube that has a radius of 5.0 mm and is 25 cm long.What is the drop in pressure over the length of this pipe?
A)140 kPa
B)46 kPa
C)72 kPa
D)76 kPa
E)130 kPa

Q 101

Motor oil,with a viscosity of 0.25 N ∙ s/m^{2},is flowing through a tube that has a radius of 3.0 mm and is 1.0 m long.The drop in pressure over the length of the tube is 200 kPa.What is the average speed of the oil?
A)0.80 m/s
B)0.90 m/s
C)1.0 m/s
D)1.1 m/s
E)1.2 m/s