How does convection play a role in hail storms?

Air flows upward in the wick of a lantern because of the liquid property called

What type of nuclear decay causes the atomic number of an element to increase by 1?

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.