See Model question Science 2080 (200+ Questions Collection Chapter= Pressure)

Science

Part:-1( Physics)

Date: 2080-10-16    Update(Morning)

Topic:-Pressure

A. Define the terms:-

1.   Pressure                                                            2. Atmospheric pressure 

3. One atmospheric pressure                                 4. Liquide pressure 

5. Hydraulic pressure                                            6. Hydraulic brake 

7. Hydraulic garage lift                                         8. Density 

9. Relative Density                                               10. Upthrust 

11. Hydrometer                                                    12. Lactometer

13. Hydraulic lift                                                 14. Normal atm. pressure

15. One Pascal pressure 

B. General question:-

1.  Prove P= F/A. What is the relation between pressure, force and area?
2.  What is liquid pressure, prove p= hdg? Where each alphabet have there own meaning?
3. Verify the Pascal's experimentally.
4. Prove that by applying a small effort large force is produced by hydraulic lift.
5. State the relation between density of liquid and its upthrust.
6. State the Pascal's law. Name an instrument which depends on it.
7. State law of floatation. Which principle is the hydrometer based on ? Write any two instruments based on Pascal law?
8. Weight of an object is decreased when immersed in water, which law does this statement represent?
9. What is the role of water in hydraulic press to multiply small force into large one?
10. If an object is immersed in water at what condition can it float in water and at what condition it an sink in water?
11. What is the relation of upthrust of a liquid with it density? Proof that liquid pressure is directly proportional to the depth of liquid.
12. State the law of floatation. Name a device based on that law and mention its use.
13. State Archimedes principle? Prove: U=Vdg.
14. Proof: U=(h2-h1)Adg . State the relationship between density and Upthrust.
15. On what factor of liquid upthrust depends upon?
16. A body is partially or completely immersed in a liquid experiences an up thrust due to the liquid. Which is equal to the weight of liquid displaced by it? Which principle does the statement represent?

C. Give reason:-

1. All cutting and piercing tool such as scissors, needles, knives etc. have sharp edges, why?
2. A sharp knife is more effective in cutting an object than a blunt knife, why?
3. The foundation of a building is made wider than walls, why?
4. The girls with heeled pointed shoe would make deep impression on the clay road than an elephant moving along same road, why?

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