About 18 | maths tricks for fast calculation | maths calculas but fast #shorts #mathstricks

Balancing OF half reactions || Balancing OF full reactions || JH tricks for fast balancing || solved class Question

There are 175 students in a class, out of which 100 students opt Maths, 70 opt Physics and, 23 opt Physics and Chemisty, 28 opt Chemistry and Maths and 18 opt of all three subjects. Now find each of the following : No. of students who opt why only Maths (ii) No. of students who opt only Physics (iii) No. of students who opt only Chemistry (iv) No. of students who opt Physics and Chemisty but not Maths (v) No. of students who opt Maths and Physics but not Chemistry (vi) No. of students who opt only one subject (viii) No. of students who opt atleast one subject (viii) No. of student who do not opt any subject.

Calculation OF Entropy Change for Ideal Gas undergoing change in state|| Phase Change||Chemical Reactions|| Class Illustrations with Short Tricks

Calculation OF deltaH||deltaE||q||W for Chemical Reaction|| Phase Change||Class Illustrations with Short Tricks

An opinion poll was conducted by interviewing 150 people. Calculate the mean age of the people on the basis of the following information about them. Use the short method.

A uniform rod of mass m and length l is struck at an end by a force F perpendicular to the rod for a short time interval t. Calculate the angular speed of the rod about the centre of mass,