Physics-
The value of force constant between the applied elastic force 
and displacement will be
Physics-General
Answer:The correct answer is: Force constant, K 
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physics-
A copper rod of length L and radius ris suspended from the ceiling by one of its ends. What will be elongation of the rod due to its own weight when 
are the density and Young’s modulus of the copper respectively?
The weight of the rod can be assumed to act at its mid-point.
Now, the mass of the rod is
⟹
Here,
L= length of the rod.
Now, we know that the Young’s modulus
⟹
or
On putting the value of M from Eq.(i), we get
or
Now, the mass of the rod is
⟹
Here,
L= length of the rod.
Now, we know that the Young’s modulus
⟹
or
On putting the value of M from Eq.(i), we get
or
A copper rod of length L and radius ris suspended from the ceiling by one of its ends. What will be elongation of the rod due to its own weight when are the density and Young’s modulus of the copper respectively?
physics-General
The weight of the rod can be assumed to act at its mid-point.
Now, the mass of the rod is
⟹
Here,
L= length of the rod.
Now, we know that the Young’s modulus
⟹
or
On putting the value of M from Eq.(i), we get
or
Now, the mass of the rod is
⟹
Here,
L= length of the rod.
Now, we know that the Young’s modulus
⟹
or
On putting the value of M from Eq.(i), we get
or
physics-
A student plots a graph from his reading on the determination of Young’s modulus of a metal wire but forgets to label. The quantities on 
and 
axes may be respectively
A student plots a graph from his reading on the determination of Young’s modulus of a metal wire but forgets to label. The quantities on and axes may be respectively
physics-General
physics-
If the ratio of lengths, radii and Young’s modulus of steel and brass wires shown in the figure are 
and 
, respectively. The ratio between the increase in lengths of brass and steel wires would be
Given, 
Let Young’s modulus of steel be
, and that of brass be 
(i)
and
(ii)
Dividing Equation (i) by Equation (ii), we get
(iii)
Force on steel wire from free body diagram
Newton
Force on brass wire from free body diagram
Newton
Now, putting the value of
in Equation (iii), we get
Let Young’s modulus of steel be
, and that of brass be (i)and
(ii)Dividing Equation (i) by Equation (ii), we get
(iii)Force on steel wire from free body diagram
NewtonForce on brass wire from free body diagram
NewtonNow, putting the value of
in Equation (iii), we getIf the ratio of lengths, radii and Young’s modulus of steel and brass wires shown in the figure are and , respectively. The ratio between the increase in lengths of brass and steel wires would be
physics-General
Given,
Let Young’s modulus of steel be, and that of brass be
(i)
and(ii)
Dividing Equation (i) by Equation (ii), we get
(iii)
Force on steel wire from free body diagram
Newton
Force on brass wire from free body diagram
Newton
Now, putting the value of in Equation (iii), we get
Let Young’s modulus of steel be
, and that of brass be (i)and
(ii)Dividing Equation (i) by Equation (ii), we get
(iii)Force on steel wire from free body diagram
NewtonForce on brass wire from free body diagram
NewtonNow, putting the value of
in Equation (iii), we getchemistry-
Salicin (structure given below) is a glycoside, found in the bark of willow tree, used in relieving pain. Observe the following reaction of salicin
The correct statement (s) is (are) :
Salicin (structure given below) is a glycoside, found in the bark of willow tree, used in relieving pain. Observe the following reaction of salicin
The correct statement (s) is (are) :
chemistry-General
chemistry-
Magnetic moment of Cr (Z = 24), Mn+ (Z = 25) and Fe2+ (Z = 26) are a,b,c. They are in the order:
Magnetic moment of Cr (Z = 24), Mn+ (Z = 25) and Fe2+ (Z = 26) are a,b,c. They are in the order:
chemistry-General
physics-
Which one of the following is the Young’s modules (in 
for the wire having the stress-strain curve shown in the figure
Young’s modulus is defined only in elastic region and
Which one of the following is the Young’s modules (in for the wire having the stress-strain curve shown in the figure
physics-General
Young’s modulus is defined only in elastic region and
physics-
The diagram shows the change 
in the length of a thin uniform wire caused by the application of stress at two different temperatures 
and 
. The variation shown suggest that
Elasticity of wire decreases at high temperature 
at higher temperature slope of graph will be less
So we can say that
at higher temperature slope of graph will be lessSo we can say that
The diagram shows the change in the length of a thin uniform wire caused by the application of stress at two different temperatures and . The variation shown suggest that
physics-General
Elasticity of wire decreases at high temperature at higher temperature slope of graph will be less
So we can say that
at higher temperature slope of graph will be lessSo we can say that
chemistry-
IfΔHf ofICl(g),Cl(g),andI(g)is17.57,121.34and 106.96Jmol–1respectively.Thenbonddissociation energyofIClbondis-
IfΔHf ofICl(g),Cl(g),andI(g)is17.57,121.34and 106.96Jmol–1respectively.Thenbonddissociation energyofIClbondis-
chemistry-General
chemistry-
Calculateenthalpychangeofthefollowingreaction H2C=CH2(g)+H2(g)→H3C–CH3(g) ThebondenergiesofC–H,C–C,C=C,H–Hare414, 347,615and435KJmol–1respectively-
Calculateenthalpychangeofthefollowingreaction H2C=CH2(g)+H2(g)→H3C–CH3(g) ThebondenergiesofC–H,C–C,C=C,H–Hare414, 347,615and435KJmol–1respectively-
chemistry-General
chemistry-
HeatevolvedinthereactionH2+Cl2 →2HClis 182KJ.BondenergiesofH–H and Cl–Clare430 and242KJ/mol respectively.The HCl bond energy is-
HeatevolvedinthereactionH2+Cl2 →2HClis 182KJ.BondenergiesofH–H and Cl–Clare430 and242KJ/mol respectively.The HCl bond energy is-
chemistry-General
chemistry-
Among the following for which reaction heat of reaction represents bond energy of HCl
Among the following for which reaction heat of reaction represents bond energy of HCl
chemistry-General
chemistry-
The correct statement(s) about the following sugars X and Y is(are) :
The correct statement(s) about the following sugars X and Y is(are) :
chemistry-General
chemistry-
The following carbohydrate is
The following carbohydrate is
chemistry-General
chemistry-
The correct functional group X and the reagent/reaction conditions Y in the following scheme are
The correct functional group X and the reagent/reaction conditions Y in the following scheme are
chemistry-General
chemistry-
Observe the following laboratory tests for a–D(+) glucose and mention +ve or –ve ion from the code given below
Observe the following laboratory tests for a–D(+) glucose and mention +ve or –ve ion from the code given below
chemistry-General