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Oxyacids OF Nitrogen|| Nitric Acid HNO3|| Preparation|| Properties|| Uses|| Shorttricks to learn reactions|| Balancing OF ReactionsOxyacids OF Nitrogen||Nitric Acid HNO3|| Preparation||Properties|| Uses|| Shorttricks to learn reactions|| Balancing OF Reactions

A block of mass 5kg lies on a rough horizontal table. A force of 19.6 N is enough to keep the body sliding at uniform velocity. The coefficient of sliding friction is

The truth table of a logic gate is a table

The sum of the multiplication table of natural number 'n' is given by 55 xx n . Find the sum of (a) Table of 7 (b) Table of 10 (c) Table of 19

The value of charge on the oil droplets experimentally observed were -1.6 xx 10^(-19), - 2.4 xx 10^(-19) and - 4xx10^(-19) C. The value of electronic charge, indicated by these results is (1) -1.6 xx 10^(-19) (2) -2.4 xx 10^(-19) (3) -4 xx 10^(-19) (4) - 0.8 xx 10^(-19)

Construct a frequency distribution table for the following marks obtained by 25 students in a history test in class VII of a school: 9,17,12,20,9,18,25,17,19,9,12,9,12,18,17,19,20,25,9,12,17, 19,19,20,9 What is the range of marks? What is the highest mark? Which mark is occurring more frequently?

Sodium and aluminium have atomic numbers 11 and 13 respectively. They are separated by one element in the periodic table and have valencies 1 and 3 respectively . Chlorine and potassium are also separated by one element in the periodic table. Their atomic numbers are 17 and 19 respectibely, buth both have a valency of 1. Explain why.