Answer:
Solids: Sound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air
Explanation:
The answer is 0 because of the velocity “u” doesn’t A
1km=10^3 m,1km^3=10^9cubic metres answer is 1.4x10^18cubic meters
Solids, liquids, gases - all matter - are made up of atoms (or other things, like molecules, that are made from atoms)! ELEMENTS are the kinds of atoms that we can have. Carbon is an element, hydrogen is an element, and so is oxygen.
so it is c hope this helps