Why can't you able to compress a wooden block?

Which one of the following has more volume. Iron block or a wooden block of same mass.

Explain why are you not able to breath normally when you are in closed and crowded places ?

Why can't SCP be used to comletely replace convetional protein sources?

A light spring of spring constant k is kept compressed between two blocks of masses m and M on a smooth horizontal surface. When released, the blocks acquire velocities in opposite directions. The spring loses contact with the blocks when it acquires natural length. If the spring was initially compressed through a distance x find the final speeds of the two blocks.

Why do you call cockroach a pest?

A hemisphere is cut from one face of a cubical wooden block such that the diameter of the hemisphere is equal to the side of the cube. Determine the total surface area of the remaining solid.