Hi everyone, I joined up today because I was scratching my head for ages about the Carnot cycle. My question was answered in 20 minutes - how great! I'm currently studying to start a PhD in biochem later this year. It means quitting my job and leaving my home behind so I am looking to suck every drop out of it. I'm therefore on a mission to re-learn all my university notes and begin to grow my knowledge of science. I never made much effort to understand the physics behind the things I was studying, but that has changed now, so I look forward to spending much more time here!