Questions

The river which starts flowing from Himalayas on the North to southwards to empty in the Arabian sea is Indus River.

Steel is not a compound or element. Steel is an alloy of iron and carbon and other elements and hence it is a mixture. Because of its high tensile strength and low cost, it is a major component used in buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons.

Pearl Harbour is an American Naval base in Hawaii

Sound is a mechanical vibration and needs a medium for propagation. The higher the density of the medium, the faster the sound travels. So, sound cannot travel through vacuum.

As the sound travels faster in solids than liquids and gases, sound travels faster in the glass than Air and water.

SHORT is the required five letter word, which becomes SHORTER when two letters 'ER' are added to it.