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Calculate the pressure inside a small air bubble of radus r situated at a depth h below the free surface of liquids of densities ρ1 and ρ2 and surface tennsions T1 and T2. The thickness of the first and second liquids are h1 and h2 respectively. Take atmosphere pressure =P0.
11
Oct
Calculate the pressure inside a small air bubble of radus r situated at a depth h below the free surface of liquids of densities ρ1 and ρ2 and surface tennsions T1 and T2. The thickness of the first and second liquids are h1 and h2 respectively. Take atmosphere pressure =P0. A number of droplets combine [...]
1. Find the cube root of each of the following numbers by prime factorisation method. (vi) 13824
11
Oct
1. Find the cube root of each of the following numbers by prime factorisation method. (vi) 13824 1. Find the cube root of each of the following numbers by prime factorisation method. (vi) 13824 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,
A soap bubble of radius R is surrounded by another soap bubble of radius 2R, as shown. Take surface tension =S. Then, the pressure inside the smaller soap bubble, in excess of the atmospheric pressure, will be
11
Oct
A soap bubble of radius R is surrounded by another soap bubble of radius 2R, as shown. Take surface tension =S. Then, the pressure inside the smaller soap bubble, in excess of the atmospheric pressure, will be A soap bubble of radius R is surrounded by another soap bubble of radius 2R as shown. Take [...]
A man is rowing a boat with a constant velocity ‘V 0 ‘ in a river the contact area of the boat is ‘A’ and coefficient of viscosity in η. The depth of the river is D. Find the force required to row the boat
11
Oct
A man is rowing a boat with a constant velocity ‘V 0 ‘ in a river the contact area of the boat is ‘A’ and coefficient of viscosity in η. The depth of the river is D. Find the force required to row the boat A number of droplets combine to form a drop of [...]
1. Find the cube root of each of the following numbers by prime factorisation method. (v) 15625
11
Oct
1. Find the cube root of each of the following numbers by prime factorisation method. (v) 15625 1. Find the cube root of each of the following numbers by prime factorisation method. (v) 15625 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,
A rain drop starts falling from a height of 2 km. If falls with a continuously decreasing acceleration and attains its terminal velocity at a height of 1 km. The ratio of the work done by the gravitational force in the first halt to that in the second half of the drops journey is
11
Oct
A rain drop starts falling from a height of 2 km. If falls with a continuously decreasing acceleration and attains its terminal velocity at a height of 1 km. The ratio of the work done by the gravitational force in the first halt to that in the second half of the drops journey is A [...]
A cubical block of side 2 m and mass 20 kg slides on an inclined plane lubricated with the oil of viscosity η=10 −1 poise, with a constant velocity of 10 m/sec (g = 10 m/sec ^ 2 ). The thickness of the layer of liquid
11
Oct
A cubical block of side 2 m and mass 20 kg slides on an inclined plane lubricated with the oil of viscosity η=10 −1 poise, with a constant velocity of 10 m/sec (g = 10 m/sec ^ 2 ). The thickness of the layer of liquid A cubical block of side 2 m and mass [...]
A viscous fluid is flowing through two horizontal pipes. the pressure difference p2 – p1 between the ends of each pipe is the same. the pipes have the same radius, although one is twice as long as the other. how does the volume flow rate Qb in the longer pipe compare with the rate Qa in the shorter pipe?
11
Oct
A viscous fluid is flowing through two horizontal pipes. the pressure difference p2 – p1 between the ends of each pipe is the same. the pipes have the same radius, although one is twice as long as the other. how does the volume flow rate Qb in the longer pipe compare with the rate Qa [...]
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A viscous fluid is flowing through two horizontal pipes. The pressure difference P2 - P1 between the ends of each pipe is the same. The pipes have the same radius ,
although one is twice as long as the other. How does the volume flow rate QB in the longer pipe compare with the rate QA in the shorter pipe? ,
The space between two large horizontal metal plates, 6 cm apart, is filled with a liquid of viscosity 0.8 N/m^2 . A thin plate of surface area 0.01 m^2 is moved parallel to the length of the plate such that the plate is at a distance of 2m from one of the plates and 4 cm from the other. If the plate moves with a constant speed of 1 m/s, then
11
Oct
The space between two large horizontal metal plates, 6 cm apart, is filled with a liquid of viscosity 0.8 N/m^2 . A thin plate of surface area 0.01 m^2 is moved parallel to the length of the plate such that the plate is at a distance of 2m from one of the plates and 4 [...]
1. Find the cube root of each of the following numbers by prime factorisation method. (ix) 175616
11
Oct
1. Find the cube root of each of the following numbers by prime factorisation method. (ix) 175616 1. Find the cube root of each of the following numbers by prime factorisation method. (ix) 175616 October 11, 2020 Category: Chapter 7 - Cubes and Cube Roots , Maths , NCERT Class 8 ,