Pressure in Liquid
Transcript of Pressure in Liquid
![Page 1: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/1.jpg)
What is pressure??
![Page 2: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/2.jpg)
![Page 3: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/3.jpg)
UNDERSTANDING PRESSURE IN LIQUID
![Page 4: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/4.jpg)
By The end of this lesson, you should be able to :-
Relate depth to pressure in a liquid. Relate density to pressure in a liquid. Explain pressure in a liquid and state p = hρg
Learning Outcome :
![Page 5: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/5.jpg)
• Students do activity to determine relationship between pressure in liquid relate to depth.
• Students will be given worksheet and solve 4 numerical problems.
Activities :
![Page 6: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/6.jpg)
How does pressure in liquid relate to depth?
![Page 7: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/7.jpg)
![Page 8: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/8.jpg)
How does pressure in liquid relate to density?
![Page 9: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/9.jpg)
What is the relationship between gravitational field strength and pressure?
Liquid pressure increases as the gravitational field strength increases
![Page 10: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/10.jpg)
Relating Pressure (p) in a liquid to the Depth (h) and Density
p = hρg
SI unit => pascal (Pa) or Nm-2
![Page 11: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/11.jpg)
Worksheet :
![Page 12: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/12.jpg)
TOPIC : PRESSURE IN LIQUID
The diagrams show two divers swimming in sea water and two divers swimming in fresh water
![Page 13: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/13.jpg)
1. Between divers A and B, who experienced greater pressure? Why?
Answer:
Diver B, because B divers deeper than A.
![Page 14: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/14.jpg)
2. Between divers B and D, who experienced greater pressure? Why?
Answer:
Diver B, because sea water is denser than fresh water
![Page 15: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/15.jpg)
3. Calculate the liquid pressure exerted on divers A and D
Given: The density of sea water = 1150 kgm-3
The density of fresh water = 1000 kgm-3
Gravitational field strength = 10 Nkg-1
Answer:
Liquid pressure on diver A
p = ρhg = (1150)(2)(10) = 2.3 x 104 Pa
Liquid pressure on diver D
p = ρhg = (1000)(6)(10) = 6 x 104 Pa
![Page 16: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/16.jpg)
4. Arrange in descending order the strength of the liquid pressure exerted on the divers A, B, C and D.
Answer:
diver B > diver D > diver A > diver C
![Page 17: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/17.jpg)
By The end of this lesson, you should be able to :-
Relate depth to pressure in a liquid. Relate density to pressure in a liquid. Explain pressure in a liquid and state p = hρg
Learning Outcome :
![Page 18: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/18.jpg)
The pressure at any point in a liquid at rest is directly proportional to :-
a) the dept of the liquid, hb) the liquid density, ρc) the gravitational filed strength, g
Conclusion :
![Page 19: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/19.jpg)
Textbook ; page 78 Exercise 3.2 Question 1 – 3
Read Practical Book Page 49
Homework :
![Page 20: Pressure in Liquid](https://reader033.fdocuments.net/reader033/viewer/2022061117/5466ad2eb4af9fba058b4922/html5/thumbnails/20.jpg)
Understanding Gas Pressure
What is gas pressure???How to measure gas pressure??
Next Lesson :