Question

Can anyone tell me the meaning of these two terms?
1. Bulk Modulus and,
2. Young's Modulus.
It's from my book.
I can't understand these two terms. Please help.
Brainly stars or moderators please tell me the answer. ​

Answer 1

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Bulk Modulus :-

Bulk modulus is the ratio of hydraulic stress to the corresponding hydraulic strain.

• Denoted by ‘B’
• B = -p/(ΔV/V)
• Where p =hydraulic stress, ΔV/V = hydraulic strain
• (-) ive signs show that the increase in pressure results in decrease in volume.
• S.I. Unit :- N/m2 or Pascal(Pa)
• B(solids) > B(liquids) >B(gases)

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Young's Modulus :-

Young’s modulus is derived from the name of the scientist who defined it.

• It is the ratio of longitudinal stress to longitudinal strain.
• It is denoted by Y.

Mathematically:

• Y= longitudinal stress/ longitudinal strain = σ/ ε = (F/A)/ (ΔL/L)
• Y=FL/ΔL
• If Young’s modulus is more, to produce a small change in length more force required.
• S.I. Unit is N m–2 or Pascal (Pa).

Answer 2

Answer:

Bulk modulus, numerical constant that describes the elastic properties of a solid or fluid when it is under pressure on all surfaces. ... Sometimes referred to as the incompressibility, the bulk modulus is a measure of the ability of a substance to withstand changes in volume when under compression on all sides.

Young's modulus is a measure of the ability of a material to withstand changes in length when under lengthwise tension or compression. Sometimes referred to as the modulus of elasticity, Young's modulus is equal to the longitudinal stress divided by the strain.