PHYSICS TOPICAL QUESTION

clensity of water= 1000 kg m-;

mark

plaslic container

Figure 3.262. The thistle funnel is immersed vertically into

water until h = 10.0 cm.3. The difference in water Jevel in the manometer, i,

is recorded.4. The thistle funnel is taken out and washed.5. Procedures 2 and 3 are repeated by inrmersing

the thistle f unnel in alcohol (density = 800 kg m-3)and giycerin (density = 1 300 kg m-.).

3.2.3 Applications of Pressllre in LiquidsConstrucrion of a Heservcrir1. Figure 3.28 sholvs resen oirs of tr.i'o different shapes.

The stn-rcture in Figure 3.28(b) is better because thewall of the base of the resenoir is thicker and canu'ithstand a greater pressure of rvater $4$tr,

(a) Thin wall

Figure 3"28

The tr-ocation of a Water Tank

A Eraph of / against p is plotted

llcm

plkgm-3Figure 3.27

,' canclusion '

The graph of l against p shows that the pressure tn a ,.

llquld is directly proportional to the density of ihe :

liquid. Tne hypotnesis is accepled.

2. Therefore, water can llow out fast fiom the pipeto consumers located at lower grounds.

Transfusion of Glucsse Solutions in thet'lospital1. In the hospital, a drip is set up by suspending a

bottle of liqurid at a high level. The liquid flows fromthe bottle thror-rgh a tube into the patient's vein.

2. Liquicl pressure causes the liquid to flow into thebodv

Figure 3.30

Formation of a Water Fountain

water

--A- nozzle

6?essidfs

Iype otliquirl

Alcohol

Water

Glycerin

Density,

/kg m-3

800

1 000

Dlfference invrater level, //cm

Figure 3.29

.\ u,aier rarrk is placed at. a hi_ch\\,aLer pressLrre p;-ociuceci at thepipe is irigh.

level so thatlowe-r end oi

lhethe

140

bottle suspended athigher level

Figure 3.31