I'm afraid and unfortunately for you, I understand it perfectly. My answer is contained in my first reply to you and that's all you need. Now take on board the comments of so many and at least show you are prepared to retract and make an attempt to understand basic thermodynamics.

You have made a complete fool of yourself Alastair and you have compounded that with your lack of understanding about centrifugal force - as *many* have pointed out; me being just one of them, though I admit to my guilt in forcing you out of hiding with this.