The solvent is usually referred to as the component of a solution which is present as the one with the larger quantity and in most cases as the liquid which dissolves a solid. In a solution, there are two components namely the solvent and the solute. The solute is the one in smaller amount.
I'm pretty sure all 4 are subatomic particles but if i had to guess i'd be Photons
When describing the velocity of an object, you must specify the both the speed and the direction.
That’s because <em>velocity is a vector</em>: it has both magnitude (speed) and direction.
If you say that a object is travelling southwest at 70 km/s, you are giving its velocity.
If you say that it is travelling at 70 km/s, you are giving its speed.
