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Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the ratio
10
Oct
Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the ratio Two wires of the same material and same mass are stretched by the same force. Their length are in the ratio 2:3. Their elongations are in the [...]
If the work done in stretching a wire by 1 mm is 2 J, then work necessary for stretching another wire of same material but with double radius of cross -section and half of the length by 1 mm is
10
Oct
If the work done in stretching a wire by 1 mm is 2 J, then work necessary for stretching another wire of same material but with double radius of cross -section and half of the length by 1 mm is If the work done in stretching a wire by 1 mm is 2 J then [...]
A massive stone pillar 20 m high and of uniform cross section rests on a rigid base and supports a vertical load of 5.0×10 ^ 5 N at its upper end. If the compressive stress in the pillar is not exceed 16 × 10 ^ 6 N/m, what is the minimum cross-sectional area of the pillar? ( Density of the stone= 2.5 × 10^3 kg/m^3 take g = 10 N/kg
10
Oct
A massive stone pillar 20 m high and of uniform cross section rests on a rigid base and supports a vertical load of 5.0×10 ^ 5 N at its upper end. If the compressive stress in the pillar is not exceed 16 × 10 ^ 6 N/m, what is the minimum cross-sectional area of the [...]
A ball falling in a lake of depth 200 m shows a decrease of 0.1% in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take g = 10 m/s^2)
10
Oct
A ball falling in a lake of depth 200 m shows a decrease of 0.1% in its volume at the bottom. The bulk modulus of the elasticity of the material of the ball is (take g = 10 m/s^2) A ball falling in a lake of depth 200 m shows a decrease of 0.1% in [...]
A small but heavy block of mass 10 kg is attached to a wire 0. 3 m long. Its breaking stress is 4.8 × 10^7 N/m^2. The area of the cross section of the wire is 10^−6 m^2. The maximum angular velocity with which the block can be rotated in the horizontal circle is
10
Oct
A small but heavy block of mass 10 kg is attached to a wire 0. 3 m long. Its breaking stress is 4.8 × 10^7 N/m^2. The area of the cross section of the wire is 10^−6 m^2. The maximum angular velocity with which the block can be rotated in the horizontal circle is A [...]
A copper bar of length L and area of cross section A is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be ( compressibility of copper is 8 × 10^−12 m^2/N and 1 atm = 10^5 N/m)
10
Oct
A copper bar of length L and area of cross section A is placed in a chamber at atmospheric pressure. If the chamber is evacuated, the percentage change in its volume will be ( compressibility of copper is 8 × 10^−12 m^2/N and 1 atm = 10^5 N/m) A copper bar of length L and [...]
Two blocks of masses 1 kg and 2 kg are connect by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is ( 40 / 3 pie ) x 10^6 N/mm^2 . What should be the minmum radius of the wire used if it is not to break? Take g = 10 m/s^2
10
Oct
Two blocks of masses 1 kg and 2 kg are connect by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is ( 40 / 3 pie ) x 10^6 N/mm^2 . What should be the minmum radius of the wire used if it is not [...]
A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm, the PE will be
10
Oct
A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm, the PE will be A long elastic spring is stretched by 2 cm and its potential energy is U. If the spring is stretched by 10 cm the PE will be October [...]
When the tension in a metal wire is T1 , its length is l1 . when the tension is T2, its length is l2. The natural length of wire is
10
Oct
When the tension in a metal wire is T1 , its length is l1 . when the tension is T2, its length is l2. The natural length of wire is its length is l1 . when the tension is T2 its length is l2. The natural length of wire is When the tension in a [...]
Young’s modulus of brass and steel are 10×10^10 N/m and 2 × 10^11 N/m^2, respectively. A brass wire and a steel wire of the same length are extended by 1mm under the same force. The radii of the brass and steel wires are RB and RS. respectively. Then
10
Oct
Young’s modulus of brass and steel are 10×10^10 N/m and 2 × 10^11 N/m^2, respectively. A brass wire and a steel wire of the same length are extended by 1mm under the same force. The radii of the brass and steel wires are RB and RS. respectively. Then respectively. A brass wire and a steel [...]