Get premium membership and access questions with answers, video lessons as well as revision papers.

Outline the equation of continuity

Outline the equation of continuity.

Answers

Consider a fluid flowing (streamline flow) through a horizontal pipe with different cross- sectional areas as shown.

Let the cross-sectional area in both sections be A1 and A2 and the corresponding speeds of the fluid be V1 and V2 respectively. The volume of fluid flowing per second in each section is given by; V = A L = A v t = A v. Where L, v t and v is the distance moved in one second. Since the volumes in each section is the same, then A1 V1 = A2 V2, hence A v = constant.
The above equation is known as the equation of continuity. Since A1 > A2, then V2 > V1. i.e. the speed increases when a tube narrows. The quantity (A v) is called volume efflux i.e. volume flowing per second.

---

Mutiso answered the question on October 12, 2018 at 17:35

Next: Discuss the four main effects of soil organic matter on soil chemical properties.
Previous: List the four main theories describing how humic substances are formed in the soil.

View More Physics Questions and Answers | Return to Questions Index

Related Questions

• Explain the occurrence of streamline and turbulent flow? (Solved)
  

  Explain the occurrence of streamline and turbulent flow?

  Date posted: October 12, 2018.  Answers (1)

• What is line of flow?(Solved)
  

  What is line of flow?

  Date posted: October 12, 2018.  Answers (1)

• A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5^oC, how long...(Solved)
  

  A girl claps her hands once at a distance 250 m from a vertical cliff. If the temperature in the surrounding is 5^oC, how long does it take for her to hear the echo?

  Date posted: October 12, 2018.  Answers (1)

• A boy strikes a railway line (steel) with a hammer. If the speed of sound in steel is 5,200 m/s, determine the time taken for...(Solved)
  

  A boy strikes a railway line (steel) with a hammer. If the speed of sound in steel is 5,200 m/s, determine the time taken for the sound to reach another boy 2.3 km down the railway line with his ear on the rail.

  Date posted: October 12, 2018.  Answers (1)

• What are the characteristics of sound waves?(Solved)
  

  What are the characteristics of sound waves?

  Date posted: October 12, 2018.  Answers (1)

• The figure below illustrates part of the displacement-time graph of a wave travelling across water at a particular place with a velocity of 2 ms^-1....(Solved)
  

  The figure below illustrates part of the displacement-time graph of a wave travelling across water at a particular place with a velocity of 2 ms^-1. Calculate the wave’s; (a) Amplitude (b) Frequency (f) (c) Wavelength
  

  Date posted: October 12, 2018.  Answers (1)

• A rope is displaced at a frequency of 3 Hz. If the distance between two successive crests of the wave train is 0.8 m, calculate...(Solved)
  

  A rope is displaced at a frequency of 3 Hz. If the distance between two successive crests of the wave train is 0.8 m, calculate the speed of the waves along the rope.

  Date posted: October 12, 2018.  Answers (1)

• Outline the characteristics of waves(Solved)
  

  Outline the characteristics of waves

  Date posted: October 12, 2018.  Answers (1)

• Define transverse and longitudinal pulses and waves giving suitable illustrations(Solved)
  

  Define transverse and longitudinal pulses and waves giving suitable illustrations.

  Date posted: October 12, 2018.  Answers (1)

• Two identical springs, whose spring constant is 6.0 N/cm, are used to support a load of 60 N as shown below. Determine the extension of...(Solved)
  

  Two identical springs, whose spring constant is 6.0 N/cm, are used to support a load of 60 N as shown below. Determine the extension of each spring.
  

  Date posted: October 12, 2018.  Answers (1)

• A body of 200 g was hung from the lower end of a spring which obeys Hooke’s law. Given that the spring extended by...(Solved)
  

  A body of 200 g was hung from the lower end of a spring which obeys Hooke’s law. Given that the spring extended by 100 mm, what is the spring constant for this spring?

  Date posted: October 12, 2018.  Answers (1)

• A load of 4 N causes a certain copper wire to extend by 1.0 mm. Find the load that will cause a 3.2 mm extension...(Solved)
  

  A load of 4 N causes a certain copper wire to extend by 1.0 mm. Find the load that will cause a 3.2 mm extension on the same wire. (Assume Hooke’s law is obeyed).

  Date posted: October 12, 2018.  Answers (1)

• If the springs shown below are similar and the constant of proportionality (k) is 100 Nm^-1, determine total extension in each arrangement. (Solved)
  

  If the springs shown below are similar and the constant of proportionality (k) is 100 Nm^-1, determine total extension in each arrangement.
  

  Date posted: October 12, 2018.  Answers (1)

• Applications of the force on a conductor(Solved)
  

  Applications of the force on a current carrying conductor.

  Date posted: October 12, 2018.  Answers (1)

• State the factors affecting the magnitude of the force on a current carrying conductor(Solved)
  

  State the factors affecting the magnitude of the force on a current carrying conductor

  Date posted: October 12, 2018.  Answers (1)

• What is an electromagnet?(Solved)
  

  What is an electromagnet?

  Date posted: October 12, 2018.  Answers (1)

• Magnetic field due to solenoid(Solved)
  

  Magnetic field due to solenoid

  Date posted: October 12, 2018.  Answers (1)

• Rules for determining the direction of the lines of force(Solved)
  

  Rules for determining the direction of the lines of force.

  Date posted: October 12, 2018.  Answers (1)

• A vertical object 5 cm high is placed 10 cm in front of a convex mirror of focal length 15 cm. find the position, size...(Solved)
  

  A vertical object 5 cm high is placed 10 cm in front of a convex mirror of focal length 15 cm. find the position, size and nature of image formed. Determine the magnification of the image.

  Date posted: October 12, 2018.  Answers (1)

• Determine the size, position and nature of the image of an object 5.0 cm tall, placed on the principal axis of a concave mirror of...(Solved)
  

  Determine the size, position and nature of the image of an object 5.0 cm tall, placed on the principal axis of a concave mirror of focal length 15 cm, at a distance 35 cm from the mirror.

  Date posted: October 12, 2018.  Answers (1)