fall through aiir at a terminal velocity of 8 cm/s. If they coalesce to form a single drop
Sahay Sir > Question Answers > fall through aiir at a terminal velocity of 8 cm/s. If they coalesce to form a single drop
On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius R and making a circular contact of radius r with the bottom of the vessel. If r<<R and the surface tension of water is T, value of r just before bubbles detach is: (density of water is ρw)
12
Oct
On heating water, bubbles being formed at the bottom of the vessel detach and rise. Take the bubbles to be spheres of radius R and making a circular contact of radius r with the bottom of the vessel. If r<<R and the surface tension of water is T, value of r just before bubbles detach [...]
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5 × 10^−2 N (see figure). The length of the slider is 30 cm and its weight negligible. The surface tension of the liquid film is
12
Oct
A thin liquid film formed between a U-shaped wire and a light slider supports a weight of 1.5 × 10^−2 N (see figure). The length of the slider is 30 cm and its weight negligible. The surface tension of the liquid film is each of radius 2 mm fall through aiir at a terminal velocity [...]
The capillary tube is dipped in water vertically it is sufficiently long so that water rises to maximum height h in the tube te length of the portion immersed in water is l>h. The lower end of the tube is closed the tube is taken out and opened again then find length of the water column remaining in the tube.
12
Oct
The capillary tube is dipped in water vertically it is sufficiently long so that water rises to maximum height h in the tube te length of the portion immersed in water is l>h. The lower end of the tube is closed the tube is taken out and opened again then find length of the water [...]
There is an air bubble of radius 1.0 mm in a liquid of surface tension 0.075 N/m and density 1000 kg/m ^ 3 The bubble is at a depth of 10 cm below the free surface. By what amount is the pressure inside the bubble greater than the atmospheric pressure? (Take g = 9.8 m/s 2 )
12
Oct
There is an air bubble of radius 1.0 mm in a liquid of surface tension 0.075 N/m and density 1000 kg/m ^ 3 The bubble is at a depth of 10 cm below the free surface. By what amount is the pressure inside the bubble greater than the atmospheric pressure? (Take g = 9.8 m/s [...]
A tapering glass capillary tube A of length 0.1 m has diameters 10^−3 m and 5 × 10^4 m at the ends. When it is just immersed in a liquid at 0∘C with larger radius in contact with liquid surface, the liquid rises 8 × 10^−2 m in the tube. In another experiment, in a cylindrical glass capillary tube B, when immersed in the same liquid at 0∘C, the liquid rises to 6 × 10^−2 m height. The rise of liquid in tube B is only 5.5 × 10^−2 m when the liquid is at 50∘C. Find the rate at which the surface tension changes with temperature considering the change to be linear. The density of liquid is (1/14) × 10^4 kg/m^3 and the angle of contact is zero. Effect of temperature on the density of liquid and glass is negligible.
12
Oct
A tapering glass capillary tube A of length 0.1 m has diameters 10^−3 m and 5 × 10^4 m at the ends. When it is just immersed in a liquid at 0∘C with larger radius in contact with liquid surface, the liquid rises 8 × 10^−2 m in the tube. In another experiment, in a [...]
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A tapering glass capillary tube A of length 0.1 m has diameters 10^−3 m and 5 × 10^4 m at the ends. When it is just immersed in a liquid at 0∘C with larger radius in contact with liquid surface ,
each of radius 2 mm ,
fall through aiir at a terminal velocity of 8 cm/s. If they coalesce to form a single drop ,
in a cylindrical glass capillary tube B ,
n drops of water ,
the liquid rises 8 × 10^−2 m in the tube. In another experiment ,
then the terminal velocity of the combined drop is 32 cm/s. Find n. ,
when immersed in the same liquid at 0∘C ,
A long thin walled capillary tube of mass M and radius r is partially immersed in a liquid of surface tension T. The angle of contact for the liquid and the tube wall is 30∘. How much force is needed to hold the tube vertically? Neglect buoyancy force on the tube.
12
Oct
A long thin walled capillary tube of mass M and radius r is partially immersed in a liquid of surface tension T. The angle of contact for the liquid and the tube wall is 30∘. How much force is needed to hold the tube vertically? Neglect buoyancy force on the tube. each of radius 2 [...]
A small steel ball falls through a syrup at a constant speed of 10cm/sec. If the steel ball is pulled upwards with a force equal to twice its effective weight; find the terminal velocity of the ball ( in cm/s ) in this case.
12
Oct
A small steel ball falls through a syrup at a constant speed of 10cm/sec. If the steel ball is pulled upwards with a force equal to twice its effective weight; find the terminal velocity of the ball ( in cm/s ) in this case. each of radius 2 mm fall through aiir at a terminal [...]
A circular ring has inner and outer radii equal to 20 mm and 50 mm respectively Mass of the ring is m = 0.8 g. It gently pulled out vertically from a water surface by a sensitive spring. When the spring is stretched 4 cm from its equilibrium position the ring is on verge of being pulled out from the water surface. If spring constant is k = 0.9 N/m find the surface tension of water.
12
Oct
A circular ring has inner and outer radii equal to 20 mm and 50 mm respectively Mass of the ring is m = 0.8 g. It gently pulled out vertically from a water surface by a sensitive spring. When the spring is stretched 4 cm from its equilibrium position the ring is on verge of [...]
A bubble having surface tension T and radius R is formed on a ring of radius b(b<<R). Air is blown inside the tube with velocity v as shown. The air molecule collides perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring.
12
Oct
A bubble having surface tension T and radius R is formed on a ring of radius b(b<<R). Air is blown inside the tube with velocity v as shown. The air molecule collides perpendicularly with the wall of the bubble and stops. Calculate the radius at which the bubble separates from the ring. each of radius [...]
A soap bubble is being blown on a tube of radius 1 cm. The surface tension of the soap solution is 0.05 N/m and the bubble makes an angle of 60 o with the tube as shown. The excess of pressure over the atmospheric pressure in the tube is :
12
Oct
A soap bubble is being blown on a tube of radius 1 cm. The surface tension of the soap solution is 0.05 N/m and the bubble makes an angle of 60 o with the tube as shown. The excess of pressure over the atmospheric pressure in the tube is : each of radius 2 mm [...]