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Capillarity and Vapour Pressure (in Hindi)
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This lesson throws light on capillarity and vapour pressure.

Harshit Aggarwal
Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

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Voice is too low!
1. COURSE: UNDERSTANDING FLUID MECHANICS WITH QUESTIONS-(1) LESSON: CAPILLARITY AND VAPOUR PRESSURE

2. ABOUT ME Graduated from NIT Nagpur in 2008 Cleared Engineering Services Examination (ESE-UPSC) Exam Got the offer letter from most of the Maharatna and Navratna Companies Cleared GATE Exam Rate, Review, Recommend, Share Follow me on Unacademy at: https://unacademy.in/user/harshit aggarwal

3. QUESTION A sPheviol quid Bubble af Radius is blown cnto 64 smmol buiyles af coho t is H a work 4d to avverk lavye me into aqual ie and velome 2. d) None

4. SOLUTION "[4 .jie] 16

5. CAPILLARITY PHENOMENA Capillarity is the phenomena of liquid due to which the liquid rises their level in small narrow conduit (tube, channel) expect mercury where the capillarity effect is the depression or fall of mercury column.This phenomena is observed in narrow tubes i.e. D< 12mm

6. EXPRESSION OF CAPILLARY RISE OF LIQUID OTHER THAN MERCURY dl F cos9 4 m g then h if High dia tube is used Rise be vej smat)

7. CAPILLARY ACTION OF MERCURY Cpill action of Merom o angle of contact 9790 capilla fol) CI35

8. QUESTION A Capillarity rise in 3mm diameter of tube immersed in a liquid is 1.5cm. If another tube of diameter 4mm is immersed in same liquid then capillary rise would be d 3mm Pg d 4 41 2 dl h2 3

9. VAPOUR PRESSURE It is a property of fluid due to which the fluid surface exerts additional pressure intensities (partial pressures) due to which bubbles in liquid are formed.The bubble rises from the liquid and collapse on the metal surfaces due to which the metal surface erodes Every liquid and gas has its own vapour pressure. Example: Water 25 KPa [2.5 m of water column] In fluid mechanics the vapour Pressure is concerned with the liquids where the region Pressure is below atmospheric pressure which leads to bubble formation.

10. THANK YOU