PLEASE HELP ME WITH THIS PHYSICS PROBLEM "A stone is dropped from a building of height H. If it takes 1 second to fall the last quarter of the distance it travels (H/4) [idk what that means], what is the height of the building? What is the total time it takes to fall the entire distance?"

Ansa new gas is observed in the form of bubbles;

Ithink it’s b hope it

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.