Question

1. # A Dimensionless Physical Quantity But Having Unit In Si System.

## Introduction

In physics, there’s a physical quantity that’s ubiquitous but seldom thought about: dimensionless quantities. In this post, we will explore one such quantity: the speed of light in a vacuum. This may not seem like a terribly interesting topic, but it’s actually very helpful when it comes to understanding complex physics concepts. In particular, we’ll see how this unit allows us to mathematically describe the behavior of objects in a vacuum.

## What is a Dimensionless Physical Quantity?

A dimensionless physical quantity is a physical quantity that does not have a unit. Dimensionless quantities can be helpful in calculations and can be more accurate than using units. In the SI system, there are six dimensionless physical quantities: the speed of light in vacuum, the Planck constant, the Boltzmann constant, the temperature, the electrical conductivity and the magnetic flux.

## How is a Dimensionless Physical Quantity Unitized in Si System?

In mathematical physics, a dimensionless physical quantity is a quantity that does not have a definite magnitude and which is not divided into any other quantities. Dimensionsless physical quantities are usually used to describe properties of particles or waves in the absence of geometric constraints. In some cases, dimensionless physical quantities may be related to SI units such as the second or the joule.

The most common dimensionless physical quantity in use in modern physics is the speed of light in a vacuum. Other well-known dimensionless physical quantities include the electronvolt and Planck’s constant.

There are several ways to unitize a dimensionless physical quantity in a SI system. One way is to use base units like the second, minute, or hour. Another way is to use derived units like the electronvolt or joule. The most common derived unit for describing Speed of Light in SI system is meter per second (m/s).

## Conclusion

In this article, we have discussed a dimensionless physical quantity but having unit in Si system. The physical quantity is temperature and it has been explained how it can be measured using thermometers. It has also been shown that the Kelvin scale is used to measure temperature. Finally, we concluded the article with explaining what Celsius is and why it is important for measuring temperature.

2. 😮 Have you ever heard of a dimensionless physical quantity but having a unit in the SI system? It may sound like a contradiction but it’s actually quite common in physics and engineering.

A dimensionless physical quantity is a number or ratio that is independent of any physical unit of measure. It has no dimensions and is thus independent of any unit of measure. Examples of dimensionless physical quantities include the speed of light, the ratio of a circle’s circumference to its diameter (π), and the ratio of the density of water to that of air.

In the SI (International System of Units) system of measurement, these dimensionless physical quantities are assigned a unit, even though they’re not actually measured with any physical unit. For example, the speed of light is assigned the unit of meters per second, even though it’s a dimensionless quantity. This is because the SI system uses the same units for all physical measurements, including those that are dimensionless.

Dimensionless physical quantities are also often used in engineering and physics. For example, they can be used to compare the performance of different materials or components, or to calculate the performance of a system at different pressures or temperatures.

So, even though a dimensionless physical quantity has no physical unit of measure, it still has a unit assigned to it in the SI system. This allows engineers and scientists to accurately compare different materials and components, or to calculate the performance of a system at different pressures or temperatures.