Class 11

This article introduces two key concepts: Error in the measurement  Experimental uncertainty The article explains each concept and provides examples for each one. One can become aware of how measurements are performed and how we communicate them to others. Everyday examples of measurement errors exist. For example, when someone buys clothes at a store, they […]

All physical “matter” contain one or even more “characteristics”, and each property of a matter seems to be measurable and quantifiable by definition. An appropriate instrument can be used to evaluate a property. Therefore, a “magnitude” and its “unit” must be presented to quantify the measured result. A unit of measurement is described as “a

Unit is a necessary and important quantity in physics. This article covers measuring units, length and weight of given objects, and the amount of a substance. Any other quantity of that kind can be expressed as a multiple of the unit of measurement. A unit of measurement is a standardised quantity of physical property used

A laboratory thermometer, sometimes referred to as a lab thermometer, is a device that is used to measure temperatures other than those of the human body.  Heat Heat is the energy delivered from one body to another as a response of a temperature differential. When two bodies of differing temperatures come together, energy is transferred—that

As the study of science and technology evolved every day, the scholars of metrics and measurements in the 1790s decided to provide a universal measuring system. The scientists adopted a universal metric system of measurements to understand the quantity of any given object.  The metric system is the currently globally recognised measurement system, succeeding the

The Celsius scale, also known as the centigrade scale, is a temperature scale based on water’s freezing point of  0℃ and boiling point of 100℃. The Fahrenheit scale is based on the freezing point of water being 32℉ and the boiling point of water being 212℉. Temperature The physical attribute of an object or body

At the 11th General Conference on Weights and Measures held in Paris, France, in 1960, scientists recognised the importance of standard units for physical quantities at the end of World War II. As a result, they developed a set of metric systems for uniform measurements. International System of Units, SI units, or multinational units are

The bar is commonly used as a unit of pressure in many nations. It’s neither a SI nor a cgs unit, although it’s widely recognised for use with SI units. The bar is a pressure unit that gives   100 kilopascals. It’s about the same as the air pressure at sea level on Earth. A

To indicate weights and measures of substances, we utilise numbers and units. A number alone is insufficient to convey the amount of material or the length of given objects. Units must accompany numbers. A unit is a standard for measuring a quantity of the same kind. They are derived units and prefixes as well. The

Identifying the attributes or dimensions of a material thing and establishing the numerical value of physical quantity with that quantity is known as measurement. It is the application of a standard scale or measuring instrument to an item, sequence of items, events, or circumstances by established protocols by people familiar with the device or scale.