Ragita Academy

                           ARTIFICIAL INTELLIGENCE In   computer science , artificial intelligence (AI), sometimes called machine intelligence, is intelligence demonstrated by machines, in contrast to the natural intelligence displayed by  humans  and animals. Leading AI textbooks define the field as the study of "intelligent agents": any device that perceives its environment and takes actions that maximize its chance of successfully achieving its goals. Colloquially, the term "artificial intelligence" is often used to describe machines (or computers) that mimic "cognitive" functions that humans associate with the   human mind , such as "learning" and "problem solving". As machines become increasingly capable, tasks considered to require "intelligence" are often removed from the definition of AI, a phenomenon known as the   AI effect . A quip in Tesler's Theorem says "AI is whatever hasn't been done ye

                                                                  Dmitri Mendeleev A chemist by both education and trade,  Dmitri Mendeleev  helped to transform the world of science with his way of organizing the elements. Mendeleev was born in Russia, where he spent much of his scientific career teaching and studying chemistry. Dmitri Mendeleev's story begins in Tobolsk, Russia. In 1834, the Mendeleev family welcomed Dmitri, youngest of 17 children, to the world. The Mendeleevs were a relatively well-off family who valued education. When Dmitri's father passed away in 1847, his mother took it upon herself to ensure that Dmitri went to university, taking him over 1,300 miles to St. Petersburg to enroll. Legend has it that Mrs. Mendeleev made the journey with Dimitri on horseback, then died shortly after he was accepted to the Institute of Pedagogy in St. Petersburg. The bright young Dmitri Mendeleev finished his studies and then began working at the university in c

                                                            Papilomavirus     Human papillomavirus (HPV) is a viral infection that’s passed between people through skin-to-skin contact. There are over 100 varieties of HPV,  more than 40 Trusted source  of which are passed through sexual contact and can affect your genitals, mouth, or throat. According to the   Centers for Disease Control and Prevention (CDC) Trusted Source , HPV is the most common sexually transmitted infection (STI). It’s so common that most sexually active people will get some variety of it at some point, even if they have few sexual partners. Some cases of genital HPV infection may not cause any health problems. However, some types of HPV can lead to the development of   genital warts  and even cancers of the cervix, anus, and throat. Some HPV infections can lead to cancer Most HPV infections (9 out of 10) go away by themselves within two years. But, sometimes HPV infections will last longer, and can

                                       Coronavirus  (COVID-19)                                                    Coronavirus disease (COVID-19) is an infectious disease caused by a newly discovered coronavirus. Most people infected with the COVID-19 virus will experience mild to moderate respiratory illness and recover without requiring special treatment.  Older people, and those with underlying medical problems like cardiovascular disease, diabetes, chronic respiratory disease, and cancer are more likely to develop serious illness. The best way to prevent and slow down transmission is be well informed about the COVID-19 virus, the disease it causes and how it spreads. Protect yourself and others from infection by washing your hands or using an alcohol based rub frequently and not touching your face.  The COVID-19 virus spreads primarily through droplets of saliva or discharge from the nose when an infected person coughs or sneezes, so it’s important that you also prac

                                      Sateyendra nath bose S. N. Bose founded quantum statistics in 1924 when he discovered a new way to derive Planck’s radiation law. Bose’s method was based on the argument that one photon of light is not distinguishable from another of the same color, which meant that a new way of counting particles was needed – Bose’s statistics. Albert Einstein extended Bose’s argument to a wider range of phenomena. Nowadays, any particle that behaves in accordance with Bose’s statistics is classed as a boson, named in honor of Bose. S. N. Bose was one of India’s most eminent scientists. Bose’s achievements in scientific research were not as sustained or as numerous as those of his contemporaries like C. V. Raman, Meghnad Saha and K. S. Krishnan, together with whom he became a pioneer of education and research in modern physics in India. But the circumstances of Bose’s intellectual development were unusual and he was destined to play an inspiring role i

                                  CHAPTER-1             CHEMICAL REACTIONS & EQUATIONS Chemical reactions 1. Chemical reaction-      Chemical reactions are the processes in which new substances are       formed. Example- Magnesium + oxygen ---->   Magnesium oxide The burning of magnesium in air to form magnesium oxide is an example of chemical reaction. Types of chemical reactions- 1.     Combination reactions 2.     Decomposition reactions 3.     Displacement reactions 4.     Double displacement reactions 5.     Oxidation and reduction reactions Components of chemical reaction are- 1.     Reactant 2.     Product Characteristics of chemical reaction- 1.     Evolution of gas 2.     Formation of a precipitate (ppt) 3.     Change in colour 4.     Change in temperature 5.     Change in state                                                                                                                                           Ch