Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
Consider an expanding sphere of instantaneous radius R whose total mass remains constant. The expansion is such that the instantaneous density ρ remains uniform throughout the volume. The rate of fractional change in density ( 1/P dp/dt ) is constant. The velocity v of any point on the surface of the expanding sphere is proportional to
12
Oct
Consider an expanding sphere of instantaneous radius R whose total mass remains constant. The expansion is such that the instantaneous density ρ remains uniform throughout the volume. The rate of fractional change in density ( 1/P dp/dt ) is constant. The velocity v of any point on the surface of the expanding sphere is [...]
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D = 1.25 × 10^−2 m and rise of water in capillary ,
h = 1.45 × 10^−2 m. Taking g = 9.80 m/s^2 and using the relation T = (rgh/2) × 10^3 N/m ,
The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary ,
what is the possible error in measurement of surface tension T? ,
A glass capillary tube is of the shape of a truncated cone with an apex angle α so that its two ends have cross sections of different radii. When dipped in water vertically, water rises in it to a high h, where the radius of its cross section is b. If the surface tension of water is S, its density if ρ, and its contact angle with glass is θ, the value of h will be (g is the acceleration due to gravity)
12
Oct
A glass capillary tube is of the shape of a truncated cone with an apex angle α so that its two ends have cross sections of different radii. When dipped in water vertically, water rises in it to a high h, where the radius of its cross section is b. If the surface tension of [...]
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A glass capillary tube is of the shape of a truncated cone with an apex angle α so that its two ends have cross sections of different radii. When dipped in water vertically ,
and its contact angle with glass is θ ,
its density if ρ ,
the value of h will be (g is the acceleration due to gravity) ,
water rises in it to a high h ,
where the radius of its cross section is b. If the surface tension of water is S ,
The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary , D = 1.25 × 10^−2 m and rise of water in capillary , h = 1.45 × 10^−2 m. Taking g = 9.80 m/s^2 and using the relation T = (rgh/2) × 10^3 N/m, what is the possible error in measurement of surface tension T?
12
Oct
The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary , D = 1.25 × 10^−2 m and rise of water in capillary , h = 1.45 × 10^−2 m. Taking g = 9.80 m/s^2 and using the relation T = (rgh/2) × 10^3 N/m, what [...]
Tags:
D = 1.25 × 10^−2 m and rise of water in capillary ,
h = 1.45 × 10^−2 m. Taking g = 9.80 m/s^2 and using the relation T = (rgh/2) × 10^3 N/m ,
The following observations were taken for dtermining the surface tension of water by capillary tube method: diameter of capillary ,
what is the possible error in measurement of surface tension T? ,
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 [...]
Assume that a drop of liquid evaporates by decreases in its surface energy, so that its temperature remains unchanged. What should be the minimum radius of the drop for this to be possible? The surface tension is T, density of liquid is ρ and L is its latent heat of vaporization.
12
Oct
Assume that a drop of liquid evaporates by decreases in its surface energy, so that its temperature remains unchanged. What should be the minimum radius of the drop for this to be possible? The surface tension is T, density of liquid is ρ and L is its latent heat of vaporization. Assume that a drop [...]
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 [...]
Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly. ( surface tension of soap solution = 0.03 N/m)
12
Oct
Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly. ( surface tension of soap solution = 0.03 N/m) Work done in increasing the size of a soap bubble from a radius of 3 cm to 5 cm is nearly. ( surface tension of [...]
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 ,