1.Define pressure with it's S.I unit.
2. Write the factors that affect pressur.
3. Define one pascal pressure.
4. Prove P=F/A.
5. Wheels of tractor is wider, why?
6. Foundation of buildings are made wider, why?
7. Studs are made on players shoes, why?
8. What is difference between air filled balloon and a hydrogen filled balloon?
9. Turban are kept on head while carrying loads, why?
10. State pascal's law with formula. Write the instrument based on it.
11. What is hydraulic press?Why is liquid used in hydraulic press?
12. Prove that hydraulic machines multiplies force.
13. Define upthrust with it's unit.
14. Write the factors on which upthrust depends.
15. How are density and upthrust related?
16. Differentiate between density and relative density.
17. Why is it easier to pull a bucket of water from the well until it is inside the water but difficult out of water?
18. Weight of an object decreases inside water, why?
19. Ship made up of metal floats but iron nail sinks, why?
20. State Archimede's principle and law of floatation.
21. Name a device based on law of floatation.
22. The bulb of hydrometer is made heavy, why?
23. Differentiate between immersion of hydrometer in pure and salty water.
24. Define atmospheric pressure with it's value at the sea level.
25. Explain the working of syringe, hand pump, air pump and barometer.
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