Polaris the north star is very bright and it doesn’t move
The terms of a equation, the momentum of an object is equal to the mass of the object times the velocity of the object. where m is the mass and v is the velocity
Answer:
For pure substances, the mass and volume will always be the same or will always change the same way because all substance are the same throughout.
While for mixtures, you can have varying amount of each component therefore mass and volume will not change the same way for substances
Answer:
Use the x method, cross over each charge.
Explanation:
and 
the +1 and -1 cancel each other out, so it will be KBr
