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<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> भौतिक विज्ञान :- विज्ञान की वह शाखा जिसके अन्तर्गत पदार्थ, ऊर्जा एवं उनकी पारस्परिक क्रियाओं का अध्ययन किया जाता है, भौतिक विज्ञान कहलाता है | रसायन विज्ञान :- इसके अन्तर्गत यांत्रिकी एवं द्रव के गुणों का अध्ययन किया जाता है, रसायन विज्ञान कहलाता है | आधुनिक भौतिकी:- इसके अन्तर्गत परमाणु एवं सूक्ष्म कणों का अध्ययन किया जाता है, आधुनिक भौतिकी कहलाता है | खगोलीय भौतिकी :- इसके अन्तर्गत ब्रह्मांड के विषय का अध्ययन किया जाता है, खगोलीय भौतिकी कहलाता है | We can understand about Science and its theories practically . When we study 📖 it's concept from deeply then we feel each things with meaning nature. 

 <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-8619641663381907"      crossorigin="anonymous"></script> A computer 🖥 is an electronic machine which stores, reads and processes data to produce meaningful information as output. Components of Computer:- Input Unit-   Devices used to give instructions, e.g., Keyboard, mouse, joystick, optical character reader, CDs, Bar code reader, Touch screen, Light Pen, Scanner, Magnetic Ink Character Recognition(MICR), etc. C entral Processing Unit-   (CPU) is the device for the manipulation of information inside the computer 🖥. CPU is known as the brain 🧠 of the computer, but commonly called a processor and has the following components. Arithmetic Logic Unit  -(ALU) performs all the logical and arithmetical operations. Control Unit - (CU) instructs, maintains and controls the flow of information. Output Unit:-  is the device to display the resu...