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Archives for Note

HSC

HSC Chemistry 1st Paper Note 2nd Chapter Qualitative Chemistry

HSC Chemistry 1st Paper Note 2nd Chapter Qualitative chemical analysis, branch of chemistry that deals with the identification of elements or grouping of elements present in a sample. The techniques employed in qualitative analysis vary in complexity, depending on the nature of the sample. In some cases, t is necessary only to verify the presence…
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JSC

JSC Science Note 14th Chapter Environment and Ecosystems

JSC Science Note 14th Chapter Environment and Ecosystems. An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water, and mineral soil), interacting as a system. These biotic and abiotic components are regarded as linked together through nutrient cycles and energy flows. Over the past…
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JSC Science Note 13th Chapter Food and Nutrition

JSC Science Note 13th Chapter Food and Nutrition. Nutrition is the science that interprets the interaction of nutrients and other substances in food in relation to maintenance, growth, reproduction, health, and disease of an organism. It includes food intake, absorption, assimilation, biosynthesis, catabolism, and excretion. The diet of an organism is what it eats, which is…
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JSC Science Note 12th Chapter Space and Satellite

JSC Science Note 12th Chapter Space and Satellite. Jump to Space Surveillance Network - In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. In 1957 the Soviet Union launched the world's first artificial satellite, Sputnik 1. Satellites are used for many purposes. A launch vehicle is…
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JSC Science Note 9th Chapter Circuit and Current Electricity

JSC Science Note 9th Chapter Circuit and Current Electricity. An electronic circuit is composed of individual electronic components, such as resistors, transistors, capacitors, inductors, and diodes, connected by conductive wires or traces through which electric current can flow. Electricity is the physical flow of electrons, referred to as an electrical current. Electricity is an energy carrier that…
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Note

Safe use of Laboratory

Safe use of Laboratory. Many laboratories contain significant risks, and the prevention of laboratory accidents requires great care and constant vigilance. Examples of risk factors include high voltages, high and low pressures and temperatures, corrosive and toxic chemicals, and biohazards including infective organisms and their to protect against laboratory accidents include safety training and enforcement of…
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HSC

HSC Chemistry Note

HSC Chemistry Note. Chemistry is the scientific discipline involved with compounds composed of atoms, elements, and molecules, combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds. Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. There are…
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HSC

HSC Notes

HSC Notes. Textbook of the academic year 2018 For Class XI and XII. Class Twelve, Ten All PDF NCTB Book Bangladesh Free Download. National Curriculum and Textbook Board (NCTB) has published new year’s Textbooks for class 9,10. These classes comprise higher secondary education in Bangladesh as well as rest of the books are provided for free to all…
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