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47)Explained: What to expect on Republic Day 2021and what not to

India Republic Day -- Republic Day 2021: In 2020it was the agitation against the Citizenship Amendment Act (CAA). Nowthousands of farmersmostly from Punjab and Haryanahave been camping at the borders of Delhi for more than a couple of monthsdemanding the Centre repeal the three farm laws. To the second year in a stripRepublic Day celebrations inside national capital will be kept under the shadow of impetuous protests against laws approved by the Centre. In 2020it was the agitation against the Citizenship Amendment Act (CAA). This timethousands of farmersmostly from Punjab and Haryanahave been camping at the borders of Delhi for more than a couple of monthsdemanding the Centre repeal the three farm laws. This years Republic Day march will also be the first major public event in pandemic occasions. What is new this year The big event will be pared down in terms of the number of spectatorsthe size of marching contingents and other side attractions. The spectator size is reduced to 2500...
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First law of thermodynamics

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For a closed thermodynamic system, the first law of thermodynamics may be stated as: δ Q = d U + δ W {\displaystyle \delta Q=\mathrm {d} U+\delta W} , or equivalently, d U = δ Q − δ W , {\displaystyle \mathrm {d} U=\delta Q-\delta W,} where δ Q {\displaystyle \delta Q} is the quantity of energy added to the system by a heating process, δ W {\displaystyle \delta W} is the quantity of energy lost by the system due to work done by the system on its surroundings and d U {\displaystyle \mathrm {d} U} is the change in the internal energy of the system. The δ's before the heat and work terms are used to indicate that they describe an increment of energy which is to be interpreted somewhat differently than the d U {\displaystyle \mathrm {d} U} increment of internal energy (see Inexact differential). Work and heat refer to kinds of process which add or subtract energy to or from a system, while the internal energ...
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Conservation of energy

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In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law, first proposed and tested by Émilie du Châtelet, means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. For instance, chemical energy is converted to kinetic energy when a stick of dynamite explodes. If one adds up all forms of energy that were released in the explosion, such as the kinetic energy and potential energy of the pieces, as well as heat and sound, one will get the exact decrease of chemical energy in the combustion of the dynamite. Classically, conservation of energy was distinct from conservation of mass; however, special relativity showed that mass is related to energy and vice versa by E = mc2 , and science now takes the view that mass–energy as a whole is conserved. Theoretically, this implies that any object with ma...
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