Pressure, Force, and Flow of Water Flashcards
(28 cards)
The pressure of a ______ object is in a downwards AND upwards direction
Liquid
If a liquid exerts a force on an object, what is the direction of the force?
Downwards and outwards
If the cistern holds 40 litres of water, you can work out the force of water leaving the tap.
What is acceleration?
The rate at which an object increases its velocity
What are the units for pressure
Pascal N/s²
If water is stationary, the type of pressure is ______.
Static
What are the units for flow rate
Litres per second l/s or Litres per minute l/m
How many kPa’s is atmospheric pressure?
101.3 kPa
How many metres of pipe is one elbow equivelant to?
What are the units for force
Newtons N
What can affect flow rate?
Flow rate can be affected by many factors:
- Changes in direction,
- Pipe size,
- Pressure,
- Length of pipe,
- Frictional resistance,
- Con
Increasing the pipe diamiter increases the ______ of water
What force in the picture pushes the water down the pipe and out of the tap, causing a flow of water.
What is flow rate?
The amount of fluid that flows through a pipe at a given time
If you reduce the diamiter of the pipe, does the presure and flow rate increase or decrease?
Both the pressure and flow rate decrease
What is velocity?
The rate at which an object changes its position, taking into account speed and direction
How do you work out intensity of pressure?
Head height x 9.81 (gravity) = Intensity of Pressure N/m2
If you reduce the diamiter of a pipe, does the speed of the water increase or decrease?
What is the resistance for:
- Elbow,
- Tee,
- Stop valve,
- Check valve,
- Pulled bend.
- Elbow = 0.5m
- Tee = 0.6m
- Stop valve = 4.0m
- Check valve = 2.5m,
- Pulled bend =
If a solid item exerts a force on an object, what is the direction of the force?
Downwards only
If water is moving, the type of pressure is ______.
Dynamic
What are the units for acceleration
Metres per second squared m/s²
How many kilos is 5 litres of water
Why does a change in direction affect the flow rate?
Changing the direction offers resistance to the flow of water
