|
The cylindrical tube of a spray pump has a crosssection of 8.0 cm2 one end of which has 40 fine holes each of diameter 1.0 mm
|
|
1
|
2688
|
August 20, 2016
|
|
If a capillary tube iis dipped in water in a state of weightlessness, how will be rise of water in capillary tube be dif ferent to that observed under normal condition?
|
|
0
|
3045
|
August 20, 2016
|
|
Why surface tension concept is only held for liquids and not for gases which are also fluids?
|
|
0
|
1980
|
August 20, 2016
|
|
It is better to wash clothes in hot soap solution Why?
|
|
0
|
4295
|
August 20, 2016
|
|
Explain why some oil spreads uniformly on water when others float as drops
|
|
0
|
2701
|
August 20, 2016
|
|
Why does an iron needle float on clean Water but sink when some detergent is added to this water?
|
|
0
|
5312
|
August 20, 2016
|
|
Why the tip of the nib of a pen is split?
|
|
0
|
7453
|
August 20, 2016
|
|
Why do the hair of a shaving brush ding together when taking out of water?
|
|
0
|
1031
|
August 20, 2016
|
|
Small insects can move about on the surface of water. Why?
|
|
0
|
2272
|
August 20, 2016
|
|
One can form a fairly large vertical film of soap solution but not of pure water. Why?
|
|
0
|
1132
|
August 20, 2016
|
|
Why does the free surface of a liquid behave like an elastic stretched membrane?
|
|
0
|
2549
|
August 20, 2016
|
|
What will happen if the length of the capillary tube smaller than the height to which the liquid rises?
|
|
0
|
2552
|
August 20, 2016
|
|
Why is it easier to spray water in which soap is dissolved?
|
|
0
|
2541
|
August 20, 2016
|
|
What is the effect of temperature on surface tension?
|
|
0
|
939
|
August 20, 2016
|
|
When wax is rubbed cloth, the cloth becomes water proof. Why?
|
|
0
|
1587
|
August 20, 2016
|
|
A manometer reads the pressure of a gas in an enclosure as shown in figure
|
|
1
|
3721
|
August 20, 2016
|
|
State and prove Pascal's law and give its experimental proof also
|
|
0
|
42240
|
August 20, 2016
|
|
The blood pressure in human is greater at the feet than at the brain. Why?
|
|
1
|
1430
|
August 20, 2016
|
|
Explain why water can be poured into a bottle with a narrow neck with the aid of glass tube?
|
|
0
|
2357
|
August 20, 2016
|
|
Water is depressed in a glass tube whose inner surface is coated with Paraffin wax. Why?
|
|
0
|
2970
|
August 20, 2016
|
|
A razor blade can be made to float on water. What forces act on this blade ? Is Archimede's principle applicable?
|
|
0
|
2330
|
August 20, 2016
|
|
What is column pressure ? Derive a relation for the same
|
|
0
|
5145
|
August 20, 2016
|
|
State Pascal's law of transmission of fluid pressure. Explain how is Pascal's law applied in a hydraulic lift (with suitable diagram)
|
|
0
|
7940
|
August 20, 2016
|
|
During blood transfusion the needle is inserted in a vein where the gauge pressure is 2000 Pa
|
|
1
|
2856
|
August 20, 2016
|
|
Two vessels have the same base area but different shapes
|
|
1
|
1780
|
August 20, 2016
|
|
A tank with a square base of area 1.0 m2 is divided by a vertical partition in the middle
|
|
1
|
2679
|
August 20, 2016
|
|
What is the excess pressure inside a bubble of soap solution of radius
|
|
1
|
4319
|
August 20, 2016
|
|
In the problem, if 15.0 cm of water and spirit each are further poured into the respective arms of the tube, what is the difference in the levels of mercury in the two arms ? (Gravity of mercury = 13.6.)
|
|
0
|
2545
|
August 20, 2016
|
|
A U-tube contains water and methylated spirit separated by mercury. The mercury columns in the two arms are in level with 10.0 cm of water In one arm and 12.5 cm of spirit in the other. What is specific gravity of spirit?
|
|
0
|
2521
|
August 20, 2016
|
|
A hydraulic automobile lift is designed to lift cars with a maximum mass of 3000 kg. The area of cross-section of the piston carrying the load is 425 cm2. What maximum pressure would the smaller piston have to bear?
|
|
0
|
4168
|
August 20, 2016
|