Because mass is not always the same for objects made from the same material. Just because an object has the same mass as another doesn’t mean they are the same material.
Answer:
1. open
2. open
Explanation:
1. An open system can exchange energy and matter.
2. The ocean is known to be an open system.
Answer. Metals are excellent conductors because the atoms in a metal form a matrix through which their outer electrons can move freely. Instead of orbiting their respective metal atoms, they form a "sea" of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions
The gravity pull of the moon is stronger when the tide is high and the pull is less when it is low tide. hope i helped
