Question

water exits a nozzle that is 2 m wide by .13 m high into the atmosphere at a mean velocity of 1.2 m/s. water density is 998 kg/m^3 and kinematic viscosity is v = 1.10 * 10^-6 m^2/s.

simplify navier-stokes equation and determine velocity as a function of y

Answer #1

1)What is the drag force on a 1.6 m wide, 1.4 m high car
traveling at 10 m/s (? 22 mph)? Suppose that the density of air is
1.2 kg/m3.
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traveling at 30 m/s (? 67 mph)? Suppose that the density of air is
1.2 kg/m3.

A long horizontal hose of diameter 3.8 cm is connected to a
faucet. At the other end, there is a nozzle of diameter 1 cm. Water
squirts from the nozzle at velocity 18 m/sec. Assume that the water
has no viscosity or other form of energy dissipation.
1)
What is the velocity of the water in the hose ?
m/s
2)
What is the pressure differential between the water in the hose
and water in the nozzle ?
Pa
3)...

A horizontal (x direction +→) water jet from a round nozzle is
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1. A feedwater heater operating at steady state has two inlets
and one exit. At inlet 1, water vapor enters at p1 = 7 bar, T1 =
200oC with a mass flow rate of 40 kg/s. At inlet 2, liquid water at
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1-
Water flows in a 10 m long and 4 cm diameter pipe
contains 4 elbows ( KL= 0.2 ) at velocity 8 m/s.
Calculate the total head losses when the friction factor
f=0.03
35.56 m
22.07 m
27.07 m
15.46 m
2- water flows in a 10 m long and 5 cm diameter
horizontal pipe at rate 15 l/s
Calculate the pressure drop
Take the density of water 1000 kg/m3 and the
dynamic viscosity 0.001 kg/m.s
74.13 kPa
96.41...

A boat crosses a 30 meter wide river, with uniform water current
Vc = 2 m/s. The boat is pointed directly perpendicular to the
current with a speed of Vb = 3 m/s over the water
observing from the bank,
how long does it take the boat to cross the river in
seconds?
how far down stream was the boat carried in meters?
what was total distance of boat traveled in meters?
what was boats total velocity in m/s?
if...

1) A nozzle is a device for increasing the velocity of a
steadily flowing stream of fluid. At the inlet to a certain nozzle
the enthalpy of the fluid is 3025 kJ/kg and the velocity is 60 m/s.
At the exit from the nozzle the enthalpy is 2790 kJ/kg. The nozzle
is horizontal and there is negligible heat loss from
it.
(i) Find the velocity at the nozzle exit.
(ii) If the inlet area is 0.1 m2 and specific volume...

A water pipe tapers down from an initial radius of R1
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Question 9 (1 point)
An airplane starts from rest (vo = 0) and accelerates down a
runway at 2 m/s2 for 23 s until it takes off. Determine the
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Your Answer:
Question 9 options:
Answer
Question 10 (1 point)
An airplane starts from rest (vo = 0) and accelerates down a
runway at 4 m/s2 and covers 245 m before it takes off. Determine
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Your Answer:
Question 10 options:
Answer
Question 11...

A grey body is one whose absorptivity
1. does not vary with temperature and wavelength of the incident
ray
2. is equal to its emissivity
3. varies with temperature
4. varies with wavelength of the incident ray
A liquid is in equilibrium with its vapor at its boiling point.
On an average, the molecules in the liquid and gaseous phases have
equal
1. potential energy.
2. kinetic energy.
3.temperature. 4. intermolecular forces of attraction.
A liquid of density 1000 kg/m3...

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