Question

write notes on scalar​

Answer 1

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A scalar or scalar quantity in physics is a physical quantity that can be described by a single element of a number field such as a real number, often accompanied by units of measurement (eg. cm). A scalar is usually said to be a physical quantity that only has magnitude, possibly a sign, and no other characteristics.

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Answer 2

Explanation:

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How tall is that building? How long did your trip take? How hot is it outside? All of these questions have one thing in common. All of the answers to these questions are called scalar quantities. A scalar is any quantity that only requires a magnitude or size to describe it completely. A scalar is any number that gives you the size or magnitude of a quantity, so a unit of measure must be attached to the number, like degrees or meters. Any random number is not a scalar. For example, the number 42 is meaningless unless you tell us that 42 is a measurement of something like distance or time or temperature.

Examples of Scalars

You go to the grocery store to purchase half an avocado for your salad. You place the avocado on the scale and the scale reads 87.9 grams. The scale reads the mass of the avocado, and mass is an example of a scalar quantity. It gives you an idea about how much avocado you're purchasing.

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