Answer:
2Mg + O2 → 2MgO
Explanation:
this is what your looking for
Answer:
I don't know why you are asking me?
Answer:
Friction is a surface force that opposes relative motion.
It depends on how much time 45 j will go, so if you told me that it went through 45 j per minute it will go through for 2 minutes so not efficient unless it went through 45 j per hour then it is efficient.
