Question

The tube shown has a length of 2.00 m and a diameter of 1.00 mm. Water at 40° C is flowing through the tube.

For water at 40° C:

A) What pressure difference is required to give the water a flow speed of 4.0 m/s? (Give your answer in units of Pa.)

B) What force applied to the end of the tube will produce this pressure? (Give your answer in units of N.)

C) What is the volume flow rate for 40 °C water if a 1.0 atm pressure difference is applied to the tube? (Give your answer in units of cm/s.)

D) What is the flow speed of the water from part C? (Give your answer in unit of m/s.)

Answer #1

A hypodermic needle is 3.14 cm in length and 0.35 mm in
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will be 1 g/s? (Use 1.0 10-3 Pa · s as the viscosity of water.)
__ Pa

Given: The viscosity is negligible. Atmo- spheric pressure is
101300 Pa.
Water flows at speed of 5.8 m/s through a horizontal pipe of
diameter 3.3 cm. The gauge pressure P1 of the water in the pipe is
1.9 atm. A short segment of the pipe is constricted to a smaller
diameter of 2.1 cm.
What is the speed v2 of the water flowing through the
constricted segment?
Answer in units of m/s.
What is the gauge pressure of the water...

Pressurized Water is heated in a thin tube with a diameter of 60
mm. water enters with a mass flow rate of 0.01 kg/s and an inlet
temperature of 20°C. a uniform heat flux of 2000 W/m2 is applied to
the tube. What is the required length of the tube to obtain an exit
temperature of 80°C for the water? If the water reaches 80°C at the
outlet, what is the surface temperature of the tube at the
outlet?

In a water pistol, a piston drives water through a larger tube
of area A1 into a smaller tube of area
A2 as shown in the figure below. The radius of
the large tube is 1.20 cm and that of the small tube is 1.50 mm.
The smaller tube is 3.00 cm above the larger tube.
(a) If the pistol is fired horizontally at a height of 1.10 m,
determine the time interval required for water to travel from the...

A hypodermic needle is 2.96 cm in length and 0.38 mm in
diameter. What pressure difference between the input and output of
the needle is required so that the flow rate of water through it
will be 1 g/s? (Use 1.0 ✕ 10−3 Pa · s as the viscosity
of water.)

Water moves through a constricted pipe in steady, ideal flow. At
the lower point shown in the figure below, the pressure is P1 =
1.70 104 Pa, and the pipe diameter is 4.0 cm. At another point y =
0.30 m higher, the pressure is P2 = 1.30 104 Pa and the pipe
diameter is 2.00 cm.
(a) Find the speed of flow in the lower section. =m/s
b) Find the speed of flow in the upper section. =m/s
(c)...

A horizontal tube has a diameter of 12.0 cm on the left, and
then shrinks to 6.5 cm on the right. Clear water enters from the
left at 4.0 m / s. We assume that the flow is simple laminar.
Calculate:
a- the mass flow of the water entering the tube
b- the velocity of the water to the right
c- if the pressure at the outlet is the atmospheric pressure,
what is the pressure at the inlet?

Given: The viscosity is negligible. Atmospheric pressure is
101300 Pa. Water flows at speed of 5.9 m/s through a horizontal
pipe of diameter 3.3 cm. The gauge pressure P1 of the water in the
pipe is 1.6 atm. A short segment of the pipe is constricted to a
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What is the gauge pressure of the water flowing through the
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Water flowing out of a 14.0 mm -diameter faucet fills a 2.00 L
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At what distance below the faucet has the water stream narrowed
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Water is flowing through a tube. The water speed is 6.30 m/s at
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pipe is 0.40 m at point 1 and 0.20 m at point 2. What is the
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points 1 and 2? (ρ(H2O)=1000 kg/m3)

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