Explain how a cat is able to land gently on its feet after a fall taking the advantage of the law of conervation of angular momentu?

A small stone, of mass 0.2 kg, tied to a massless, inextensible string, is rotated in vertical circle of radius 2 m. if the particle is just able to complete the vertical circle, what is its speed at the highest point of its circular path? How would this speed get effected if the mass of the stone is increased by 50%? (Take g = 10 ms^(-2) )

Name the scientists and write how did they explain Mendel's laws after the chromosomes were discovered.

What is implantation? Where does it take place? How many days after fertilization does it take place in humans? Explain breifly how it occrs.

How much momentum will a dumb-bell of mass 10 kg transfer to the floor if it falls from a height of 80 cm ? Take its downward acceleration to be 10 ms ^(-2) .