A five-rupee coin kept on a stiff card kept covering an empty glass falls into the glass if the card is given a sharp horizontal flick with a finger. Give reason.

The velocity of a curling stone is due east. what will be the direction of the momentum of the curling stone as it moves?

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

The softest and hardest minerals are: softest hardest