Relative density is a dimensionless quantity and it’s measurable, on which scale is hydrometer calibrated? If relative density is a dimensionless quantity and it’s measurable. Also it’s widely used in industry to determine the concentration of a substance in a solution.
Which is the dimensionless quantity?
In dimensional analysis, a dimensionless quantity is a quantity to which no physical dimension is assigned , also known as a bare, pure, or scalar quantity or a quantity of dimension one, with a corresponding unit of measurement in the SI of the unit one (or 1), which is not explicitly shown.
Which is not a dimensionless quantity?
The dimensional formula of moment of momentum is [ML2T−1]. This means that angular momentum is not a dimensionless quantity.
Is mass a dimensionless quantity?
| Physical quantity Unit | Atomic mass AMU = 1.66054 x 10-27kg |
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Why relative density is dimensionless quantity?
Relative density has no unit because it is the ratio of same units which gets cancelled . Answer: ... As both the numerator and the denominator on the RHS of the above formula has the same unit (i.e. kg/m3) they get cancelled. Hence relative density has no unit.
Is refractive index is dimensionless quantity?
v is the velocity of light
Is force a dimensionless quantity?
The ratio of the internal forces to the external forces will depend upon its speed, and the viscosity of the fluid, and the size of the body. But the ratio of the internal to the viscous forces is dimensionless , so it must depend on some combination of the viscosity, speed V and linear size l that is dimensionless.
Is a Unitless a quantity?
Units are used as a measure to obtain quantities in the physical world. ... So dimensionless physical quantities can have units. When considering unitless quantities it is impossible for them to have any dimension, since a unitless quantity does not have dimensions .
Is stress is a dimensionless quantity?
dimensionless . Hint: We can define stress as the reactive force per unit area. Mathematically it is defined as the ratio of force and area of cross-section. Keeping the characteristics of stress in mind we will find the correct option.
What has unit but no dimension?
Angle and solid angle are the physical quantities which have no dimensional formula as they are the ratios of the same physical quantity, but we measure them.
What is SI unit of relative density?
Answer: The relative density or specific density is the ratio of density of a substance with respect to the density of water at 40 C. ... The density of any substance defined as mass per unit volume. Hence, its SI unit is: kg/m3 .
What is dimensional formula of density?
The formula for density is d = M/V , where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Is relative density is a dimensionless?
Relative density is defined as the ratio of density of the material and the density of a reference material. ... As relative density is the ratio of two densities, it will be a dimensionless quantity .
What is the unit of refractive index?
There is no SI units for refractive index , since it is a ratio of light velocity
What is meant by refractive index?
Refractive Index (Index of Refraction) is a value calculated from the ratio of the speed of light in a vacuum to that in a second medium of greater density . The refractive index variable is most commonly symbolized by the letter n or n’ in descriptive text and mathematical equations.
Is Angle a dimensionless quantity?
3. Angles. ... For example, in the current SI, it is stated that angles are dimensionless based on the definition that an angle in radians is arc length divided by radius, so the unit is surmised to be a derived unit of one, or a dimensionless unit.
