Sir, I am student of class 10th,I am wondering that concept of INERTIA is only the difference between force acting by friction and external force applied.For eg . When coin in placed on flash card put above empty container , force applied by uswith fast speed is more due to more acceleration and when card is hitted slowly force ( ma) is less than that of frictional force.Am I thinking right or wrong ? Please Explain!

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane