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Match the items in List 1 (names of quantities) with those in List 2 (units of quantities in the SI system). Use codes in List for matching.
List-I
List-II
M. Dynamic viscosity
1. N/m
N. Kinematic viscosity
2. N.m
O. Surface tension
3. N.s/m2
P. Energy
4. m2/s
Kinematic viscosity: The ratio of dynamic viscosity to fluid’s mass density is called kinematic viscosity. It is generally represented by the symbol v(nu).
V = µ/ρ
In the SI system, the unit of kinematic viscosity is m2/s. However, in the CGS system, kinematic viscosity is measured in stokes, which is equivalent to cm2/s.
Dynamic viscosity:- The coefficient of viscosity, µ, is also known variously as the coefficient of dynamic viscosity, absolute viscosity, or simply as viscosity. It has the units The ratio of shear stress to the rate of shear strain is called dynamic viscosity. It represents viscous forces in fluids. It is useful when only viscous forces are dominant in the flow. Its unit is 1 Ns/m2 = 10 Poise.
Surface tension:- It is defined as the tensile force acting on the surface of a liquid in contact with a gas or on the surface between two immiscible liquids such that the contact surface behaves like a membrane under tension. The magnitude of this force per unit length of the free surface will have the same value as the surface energy per unit area. It is denoted by the Greek letter σ (called sigma). In MKS units, it is expressed as kgf/m while in SI units as N/m.
Energy:- Energy is required for doing any type of work, energy can therefore be defined as the ability to do work. The unit of energy is Newton-meter (Nm) known as Joule (J).
Hence the correct table is
| List-I | List-II |
| M. Dynamic viscosity | 1. N.s/m2 |
| N. Kinematic viscosity | 2. m2/s |
| O. Surface tension | 3. N/m |
| P. Energy | 4. N.m |