1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marizza181 [45]
3 years ago
5

You work for the city water department and need to pump 3400 liters/minute of water from a tank at ground level into a vented (i

.e., open-top) water tower, 75 meters above ground. The pump can be considered adiabatic, and the combined efficiency of pump and its drive motor is 90 percent. Determine: the electric power required (kW) to drive the pump if friction losses are neglected and the average velocity (m/s) of the water if a 20-cm diameter (ID) pipe is used.
Physics
1 answer:
umka21 [38]3 years ago
3 0

Answer:

P_E=46.2778\ kW

v=1.804\ m.s^{-1}

Explanation:

Given:

  • flow rate of water, \dot{V}=3400\ L.min^{-1}=3.4\ m^3.min^{-1}

<em>∵Density of water is 1 kg per liter</em>

∴mass flow rate of water, \dot{m}=3400\ kg.min^{-1}

  • height of pumping, h=75\ m
  • efficiency of motor drive, \eta=0.9
  • diameter of pipe, D =0.2\ m

<u>Now the power required for pumping the water at given conditions:</u>

P=\dot{m}.g.h

P=\frac{3400}{60} \times 9.8\times 75

P=41650\ W

<u>Hence the electric power required:</u>

P_E \times \eta=P

P_E \times 0.9=41650

P_E=46.2778\ kW

<u>Flow velocity is given as:</u>

v=\dot{V}\div a

where: a = cross sectional area of flow through the pipe

v=\frac{3.4}{60}\div (\pi.\frac{0.2^2}{4} )

v=1.804\ m.s^{-1}

You might be interested in
When a wave hits an object,energy from the wave is both absorbed and reflected off the object
poizon [28]
I believe the statement is true. Have a good day.
5 0
3 years ago
A meter stick is held vertically with one end on the floor and is then allowed to fall. Find the speed of the other end when it
Ilia_Sergeevich [38]

Below is the attachment of the solutions.

5 0
3 years ago
I can not find the answer to the one after potassium ?
Zepler [3.9K]

Answer:

it’s halogen

Explanation:

3 0
2 years ago
Displacement vectors of 4 km north, 2km south, 5 km north, and 5km south combine to a total displacement of A 2 km south B 16 km
prohojiy [21]
I would prolly say C. 16 km south.
4 0
3 years ago
Read 2 more answers
PLEASE HELP!!!! I’ll give brainliest!
Jet001 [13]
Ok well I know measure of long leg is 30 degrees and short leg is 60 degrees
3 0
3 years ago
Other questions:
  • Most stars are members of groups of two or more stars, called _____.
    8·1 answer
  • A 0.09-kg lead bullet traveling 182 m/s strikes an armor plate and comes to a stop. If all of the bullet's energy is converted t
    7·1 answer
  • 1. Monique is nine weeks into her pregnancy, and she had an appointment with her doc tor today. She is very happy and excited be
    7·1 answer
  • Consider a 10 gram sample of a liquid with specific heat 2 J/gK. By the addition of 400 J, the liquid increases its temperature
    6·1 answer
  • A _ spreads light into its own individual colors.
    14·2 answers
  • Where is cloud data stored?
    5·2 answers
  • If you applied a force of 200 Newtons to lift a box 2.20 meters above the floor, how much work would you be doing?
    6·1 answer
  • a disk of a radius 50 cm rotates at a constant rate of 100 rpm. what distance in meters will a point on the outside rim travel d
    10·1 answer
  • A 600kg lifts starts from rest. It moves upward for 3.00 s with a constant acceleration until it reaches its final speed of 1.55
    15·1 answer
  • Newton's third law states that forces always occur in
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!