Can a dimensionless quantity have a unit?

Can a dimensionless quantity have a unit?

Dimensionless quantity is also known as the quantity of dimension with one as a quantity which is not related to any physical dimension. It is a pure number with dimension 1….Example Of Dimensionless Quantity With Unit.

Physical quantity Unit
Atomic mass AMU = 1.66054 x 10-27kg

Why magnification is called a unit less quantity?

Magnification is the ratio of size of image to size of object and since it is a ratio of two similar quantities hence it is unitless.

Can two different physical quantities have same dimensions?

Answer Expert Verified no . for example both torque & energy has the same dimensions ML^2T^-2 . but they r diff physical quantity.

Does Angle have unit?

The SI derived unit of angle is the radian, which is defined as the angle for which the radius equals the arclength.

Is Angle dimensionless physical quantity?

Before doing that you should note that the angles have units. They are just dimensionless. A unit of measurement is a definite magnitude of a physical quantity, defined and adopted by convention or by law, that is used as a standard for measurement of the same physical quantity.

What is the physical quantity of angle?

List of physical quantities

Derived quantity Symbol Dimension
Plane angle θ 1
Power P M L2 T−3
Pressure p M L−1 T−2
Pop p→ L T−6

Is refractive index a dimensionless quantity?

v is the velocity of light in that particular medium. c is the velocity of the light in vacuum. So, we can say that the refractive index is a dimensionless quantity.

Can a physical quantity have units but still be dimensionless?

Yes a quantity have units but still be dimensionless for example,unit of angle is radian ,but it is a dimensionless quantity. A dimensionless quantity may have unit. Eg. A unitless quantity never has a non-zero dimension.

Which of the following is dimensionless physical quantity?

Answer: Stress is ratio of same physical quantities hence dimensionless. Answer: Strain is ratio of two lengths , a measure of deformation increase/decrease in length wrt original length.

Do all physical quantities have units?

In physics, there are seven fundamental physical quantities that are measured in base or physical fundamental units: length, mass, time, electric current temperature, amount of substance, and luminous intensity. All other units are made by mathematically combining the fundamental units.

Is force a base quantity?

Examples of such SI derived units are given in Table 2, where it should be noted that the symbol 1 for quantities of dimension 1 such as mass fraction is generally omitted….

Derived quantity force
Name newton
Symbol N
Expression in terms of other SI units
Expression in terms of SI base units m·kg·s-2

What type of physical quantity is work?

Work is a scalar quantity because it only has a magnitude and no direction is required to specify it. Note: It should be noted that work is equal to the scalar product of two vector quantities: force and displacement. The quantity obtained from a scalar product or dot product is always a scalar quantity.

What is the difference between a physical quantity and a number?

A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as the combination of a numerical value and a unit. For example, the physical quantity mass can be quantified as n kg, where n is the numerical value and kg is the unit.

How do you calculate physical quantity?

Physical quantity is the property of an object that can be quantified. For instance, the physical quantities are the length of a rod or the mass of a body. Measurement is the act of comparing a physical quantity with its unit. Measurement result is the value of a physical quantity obtained by means of measurement.

What is not a basic quantity?

Here in this question length, time and amount of substance are basic physical quantities; they are not derived from any other quantity, whereas density is a derived physical quantity from mass and volume (length). So, from the above explanation it is clear that density is not a basic physical quantity.