- #141
A.T.
Science Advisor
- 12,476
- 3,610
A.T. said:But without stating the "by ... on ..." (as you suggest), it's not clear at all how the resulting sign corresponds to the direction of the energy transfer.
If it's "not easy", requires guessing based on intuition ("context tells you") and only works "usually ", then it's definitely not the right approach for beginners.sophiecentaur said:Yes it's not easy but context usually tells you ...