4) Which of the following is dimensionless?
A) Bulk modulus
B) Strain
C) Shear stress
D) Coefficient of linear expansion
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1
Explanation:
A dimensionless quantity is the one for which no physical dimension is assigned. It is also known as a bare, pure, or scalar quantity or also as a quantity of dimension one.
Work and energy both are having the same dimensions as [ML
2
T
2
]. The ratio
Work
Energy
will be a dimensionless quantity.
The correct option is D.
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