or : : Terminal velocity, y= 21 0-)g wo " ‘This is the required expression, Mm EXPERIMENT5 = IM: To determi: . . Al eoemine ed coefficient of viscosity of a given viscous liquid by measuring terminal velocity of a given spherical body. APPARATUS ‘A nhalf metre high, 5 cm broad glass cylindrical jar with millimetre graduations along its height, stopclock/watch, thermometer and clamp with transparent viscous liquid, one steel ball, screw gauge, stand.1 meen 2b e 214 euntoennnp nmbecited price ony ow j rn a — igs oper lignan inde roceDUne 1 Chas the las jr and it with he vious guid, which must be trap 2 Check hatte vet sa alogthe ight ofthe ari any wise Note 9 Tete opdek athe tht spring. Find it et count and eo cee 4 Rodentcere thet ont and sere ero ofthe sre gage 5 Deerise mean icf he tal ‘rope bagel inthe bu als down inthe iu with accelerated oretudof th bight fui. Then, it fll with uniform terminal loa Sarthe apt atch hen thebal rakes ome convenient division 20 eee Ser orca when al rexhes lowest convenes ie 9 nd andnot the distance fen andi taken byt 10 Repeat step to tote mre, — 1 Hot and nrdtemprtan ofthe 28 Ferd yar cierto eens os xnt038 tect of seek nath oo pe oot stoplctvath 5 Fe sotthe screw 10g) = fart diconsen theckalrsale 1 ent countof screw guge(L.C) a eroerovo 00058) aa Fe meting) in pinmeter of spherical ball “Nong one deci bee 1) inperpendeaa dection, as ‘terminal velocity of spherical al Dounce fallen, =e ‘CALCULATIONS Mean dameer b= De Meant, ean tine, . , Mean terminal velit, " was! rom formas, ne MW. cos es Resuur 6s as Mecoeicent of viscosity fthe lat cempane 0+ Purcattions . aba bee 2 Liga be tramaparntso tht tbestanstbebuane 2 Ba shouldbe perfectly phere 3. Yeo shoud be noted any whemitbecores constant174 SOURCES OF ERROR Q1. Ans. Q.2. Q3. Ans. Q4. Ans. Qs. Ans. Q6. Ans. Q7. Ans. Qs. Ans. Qs. Ans. Q.10, Ans, ‘The liquid may not have uniform density. ‘The ball may not be perfectly spherical. The noted velocity may not be constant. VIVA VOCE Define viscosity. Read Art. 12.01 (a). Define coefficient of viscosity. » Read Art. 12.02 (6). Give units of coefficient of viscosity. Read Art. 12.02 (0). ive dimensional formula of coefficient of viscosity. Read Art. 12.02 (@). Write expression for Stokes’ law. Read Art. 12.03. Define terminal velocity. Read Art. 12.04 (a). Give expression for terminal velocity, Read Art. 12.04 (b). Why liquid taken must be transparent? It is so because the motion of ball must be visible in the liquid. How does the viscosity of liquid and Bases change? The viscosity of liquid decreases with increase i increase in temperature, The viscosity of liquid i of gases does not change with pres sure, Why does a hot water move faster than cold water? Itis because the viscosity of hot Water is smaller than that of cold watet