I've found a useful Chemistry/Biology tutor for all you science students out there

David Davis

here he is doing stuff on his site about energy flows:-

done var vars = {javascriptid: 'video-0', width: '400', height: '300', locksize: 'no'}; var params = {allowfullscreen: 'true', allowscriptaccess: 'always', seamlesstabbing: 'true', overstretch: 'true'}; swfobject.embedSWF('http://v.wordpress.com/o1N0BlBm', 'video-0', '400', '300', '9.0.115','http://v.wordpress.com/wp-content/plugins/video/expressInstall2.swf', vars, params);

And here’s his main blog:-

http://chemicalguy.wordpress.com/

[Via http://libertarianalliance.wordpress.com]