A vessel completely filled with water has holes A and B at
depths h and 3h from the top respectively Hole A is a square of side L
and B is circle of radius r the water flowing out per second from both
the holes is same then L is equal to
Ans. L= 31/4 π1/2 r
Ques 2. A cylinder of fixed capacity 67.2 litres contains helium gas at
STP the amount of heat needed to rise the temperature of the gas in
the cylinder by 20° C is
Ans. 747.9 J
Chemistry
Ques 1. Affinity of Hb towards CO, CO₂, O₂ (Arrange in increasing
order).
Ans. CO> CO₂> O₂
Ques 2. Boron has two isotopes with atomic masses 10 and 11 if it’s
average atomic mass is 10.81 the abundance of lighter isotope is
Ans. 19