Question

26. Give examples for the following:
a) A dimensionless, unit less physical quantity,
b) A dimensionless physical quantity but having unit in SI system.
c) Two physical quantities which have the same dimensions.​

Answer 1

Answer:

polygon is regular when all angles are equal and all sides are equal (otherwise it is "irregular"). This is a regular pentagon (a 5-sided polygon).

Answer 2

Answer:

ANSWER

a) solid angle Ω=

r

2

A

steradian and a plane angle θ=

r

L

radian, Both dimensionless but have units.

b) specific density =

densityofwaterat4

0

C

densityofmedium

it is a ratio of two same quantities. So, it is a unitless and dimensionless constant.

c) Gravitational constant (G)=6.67×10

−11

N−m

2

/kg

2

d)Reynold's number is a constant which has no unit.

Explanation:

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