I'm very confused on the concept of gas.
From what I understand, gas is a unit of ethereum, that measures the cost of a transaction. I'm not sure why we call it gas and separate it from ethereum. I read it measures the "technical cost" not "market cost" which makes no sense to me on how.
On average, it takes me $0.10 to send a transaction. So, does this mean when you run out of gas you have less than $0.10 cents of ethereum?