Answer:
it cannot be considered a physical change because it occur from the chemical reaction.
Explanation:
because physical change is the change of the size,volume, density,flexibility. in other words its a change in the outer appearance or change in which we can see or feel without using a tool or a machine
hope it help just my opinion
Answer:
density of the gas
Explanation:
When traveling through gases, density of the gas also determines how fast a sound wave travels.
Answer:
because we naturally use energy everyday in everyway , energy is also a bill for instance you electric bill used by energy
Explanation:
Answer:
X = 12N
Explanation:
Anticlockwise moment = Clockwise moment
Taking the moment at the pivot,
Anticlockwise moment = X×2.0m
Clockwise moment = (2.0N × 4.0m) + (4.0N × 4.0m)
Hence, 2X = (8 + 16)
2X = 24
X = 12N.
I HOPE IT'S OK.
