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1.
We have two (narrow) capillary tubes 
and 
. Their lengths are 
and 
and radii of cross-section are 
and 
respectively. The rate of flow of water under a pressure difference 
through tube is 
. If 
and 
, what will be the rate of flow when the two tubes are connected in series and pressure difference across the combination is same as before 
and . Their lengths are and and radii of cross-section are and respectively. The rate of flow of water under a pressure difference through tube is . If and , what will be the rate of flow when the two tubes are connected in series and pressure difference across the combination is same as before
2.
A horizontal pipe of cross-sectional diameter 5 cm carries water at velocity of 
. The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is
. The pipe is connected to a smaller pipe with a cross-sectional diameter 4 cm. the velocity of water through the smaller pipe is
3.
A vessel, whose bottom has round holes with diameter 0.1 mm is filled with water. The maximum height upto which water can be filled without leakage is (Surface tension = 
and 
)
and )
4.
Two pieces of glass plate one upon the other with a little water in between them cannot be separated easily because of
5.
Two rain drops falling through air have radii in the ratio 1:2. They will have terminal velocity in the ratio
6.
At which of the following temperatures, the value of surface tension of water is minimum?
7.
If the rise in height of capillary of two tubes are 6.6 cm and 2.2 cm, then the ratio of the radii of tubes is
8.
A closed rectangular tank is completely filled with water and is accelerated horizontally with an acceleration 
towards right. Pressure is
(i) maximum at
(ii) minimum at
towards right. Pressure is(i) maximum at
(ii) minimum at
9.
The spring balance 
reads 2 kg with a block of mass 
suspended from it. A balance 
reads 5 kg when a beaker with liquid is put on the pan of the balance. The two balances are now so arranged that the hanging mass is inside the liquid in a beaker as shown in figure
reads 2 kg with a block of mass suspended from it. A balance reads 5 kg when a beaker with liquid is put on the pan of the balance. The two balances are now so arranged that the hanging mass is inside the liquid in a beaker as shown in figure
10.
If there were no gravity, which of the following will not be there for fluid?