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Baking Soda (Sodium Bicarbonate) Washing Soda (Sodium Carbonate) Sodium Hydroxide Plaster of Paris Water of crystallization (or water of hydration) It refers to the specific number of water molecules present in one formula unit of a salt. This water is not present as liquid but is bound within the solid structure. Plaster of Paris is…
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Trigonometry Introduction Trigonometry ratios of specific angles Triogonometry Complementary angles Allied angle: Two angles are said to be allied if their sum or difference is a multiple of π/2 radians (90 degree). Trigonometry identities problems
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Reflection Laws of reflection Spherical mirrors Properties of image formed by a plane mirror Problems based on reflection, concave and convex mirrors. Concave and Convex Mirrors Problem-1: An object of 5.0 cm in length is kept at a distance of 20 cm in front of a convex mirror of radius of curvature 30 cm. Find…
Atomic mass can be determined by applying the following formula. Atomic mass = (w1A1 + w2A2)/(w1+w2) If the weight is given in terms of weight percentage replace w1 as w1% , w2 as w2 % and (w1 + w2) as 100 respectively in the above equation.
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In a flight of 600km, a aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200km/hr and the time of flight increased by 30 minutes. Find the duration of flight. (Ans : 1 hr) Concept: Speed problem Formula: S = V x t , where S =…
Learning activities in Pair of linear equations Flash cards Concept maps Model Problem Mapping Guided Problems Word scrambler Oral Test Fill up the blanks Infographics Sketch note summary Flash cards created by Kaviya
Word problems are very important in pair of linear equations. There are four methods of solving pair of linear equations. Graphical method Elimination method Substitution method Cross multiplication method You can choose any one of the above methods to solve the word problems or as per the question. There are some steps recommended to solve…