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What is difference between a physical quantity and a number?

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A physical quantity is a number of object(s) that are tangible objects. A number doesn't have to represent any specific quantity of items, but rather just a quantity in an equation.

Phsyical quantity: 5 chairs, 2 apples

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A physical quantity is always measured of natural non-living objects (Inanimate objects) whereas a number is always displayed with the corresponding digit (1-9)
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What is ratio between two different quantities?

A ratio is basically a comparison of two different quantities to each other. You often find ratios in their simplest form. For example, if, in one container, you had 500ml

What is the difference between derived quantities and fundamental quantities?

In the SI system, there are two categories of unit: the Base Unit and the Derived Unit. There is no such category as 'fundamental unit'. There are seven Base Units. These are:

The differences between scalar quantities and vector quantities?

A scalar quantity is just a number e.g. 3 miles A vector quantity is a number with directions e.g. 3 miles south So the difference between them is that vector has a particular
In Science

Ratio between two different quantities?

A ratio between two quantities, usually with differing units, is called the rate. When describing the units of a rate, "per" usually separates them. For instance: beats pe

What is the fundamental differences between demand and quantity?

demand = how much people want it quantity (supply) = how much you have/can sell When the demand drops, the supply increases, and when the supply increases, the demand drops, b
In Science

What is difference between base quantity and derived quantity?

Base quantities (Scalar Quantities) : Independent quantities who have single standard units. - time /seconds -distance/meters Derived Quantities (Vector Quantities): Quantitie