Both the xylem and phoem are tubular structures one is uni directional and other is bi-directional.comment on it.

A shell of 20kg moving at 50m/s bursts into two parts of masses 15kg and 5kg .If the larger part continues to move in the same direction at 70m/s .What is the velocity and direction of motion of the other piece.

Is it possible that the velocity of an object be in a direction other than the direction of acceleration?If yes,give an example.

In the presence of peroxide, hydrogen chloride and hydrogen iodide do not give anti Markovnikov's addition to alkenen because : both are highly ionic, one is oxidising and the other is reducing, one of the steps is endotherrmic in both the cases, all the steps is exothermic in both the reactions