new update has been released on steemit block chain, i was also searching in simple way that what is RCs ,voting mana, and voting power. every one wana know about it in simple words, so today i was reading also about it to get simple way information about these term, when i was reading one post, i could not understand meaning of all above words that i mentioned in post title.
but when i tried to read comments of steemian, i saw one good comments about these words definations in simple way. i think 
soruce of comments that i got is
For what i know, RCs is the amount of mana you can use to vote, post, redeem rewards or any interaction with the blockchain... Voting mana really doesnt exist, just voting power, although your RCs (mana) is consumed every time you vote also... The more steem power you have, you have more recourse credit (mana)... Its almost the same than before, just that no one cared about bandwidth because that rarely got consumed (just for very rare cases for users with very low steem power)... Now seems like mana get consumed very quick... we just have to wait to see how this develops...
hope now every one is will get actual meaning of RCs.. every one was worry about words RCs as i'm , but here i wana also clear this that Rcs is good change in steemit, before RCs every one was posting on steemit without care,
what is good points of new update
here i note that before update of this version, every one was posting without care, one steemit user was doing post daily over 10 post, and he was using voting power, but in this case , we will be more care full, and will upload only best post, will do best effort, and it is also very nice , in this care every person , new or old will write with more care, will not write common things here, every steemian will try to write good post, will upvote good, work.
thanks sir 
upvote resteem