Lec 3 _ what are prefixes in physics in Urdu class 9

in this video we will study about "what are prefixes in physics in Urdu class 9 , prefix examples "Prefixes are the words or letters added before SI units such as kilo mega giga and milli. In physics, prefixes are used to express very large or very small quantities conveniently. These prefixes are added to the base unit to form larger or smaller units. Some common prefixes used in physics are: kilo- (k): 10^3 mega- (M): 10^6 giga- (G): 10^9 milli- (m): 10^-3 micro- (μ): 10^-6 nano- (n): 10^-9 For example, if we want to express the mass of an object in kilograms, we can use the prefix 'kilo-' and write it as 10^3 grams. So, 1 kilogram is equal to 1000 grams. Similarly, if we want to express the speed of light, which is a very large number, we can use the prefix 'mega-' and write it as 3 x 10^8 meters per second. So, we can say that the speed of light is 300,000,000 meters per second. In class 9 physics, students learn about these prefixes and how to convert from one unit to another using these prefixes. They also learn how to use scientific notation to express very large or very small quantities. Queries about prefixes what are prefixes introduction to physics definition of prefixes prefix examples Prefixes definition prefixes physics class 9 physics #prefixesdefinition #prefixesinurdu #whatareprefixes #prefixesclass9lec #class9lec