Sports gt; Swimming Diving
That is the next big question! Up until very recently gravity has been treated as an explanatory principle. It takes a form like a tautology or a circular definition. What is gravity? It is what makes things fall. Why do things fall? Gravity. The search for an explanation for gravity one of the driving questions of Unified Field theory, String theory, M-Theory and all the other theories of everything being proposed. Attempts to make it out as a space time distortion caused by mass in relativity has problems, In M-Theory it requires at least one other complete universe to be postulated (with laws of physics unlike ours) and there seems to be no way to explain it in terms of particle physics. Darn good question! If you ever figure out the answer, publish! It will make you the next Newton or Einstein.
6 across is Beaker. 10 across is probably pen or pencil - how many spaces do you have for it? 14 across might be messy 17 across might be matches 24 across might be hood 27 across is roll 29 across could be thermometer 30 across might be never 1 down might be ask 2 down might be teacher 3 down might be yell 4 down is water 6 down might be lab bench 9 down might be equipment 12 down might be glove(s) 14 down might be label 18 down might be solids 19 down might be everyone 21 down might be lights 24 down might be hands I don't know about the other ones. Hope this gives you some help?
My answer is a year later. But I have the same problem. You have bad IT Bands which is a muscle that goes from the hip to the knee. You need to get an MRI done to see if your IT bands are tight and if they are go to a sport medicine physically therapy center and that will massage ans loosen your muscles with excerises at the client with a PT trainer. I still have knee problems like it is going to pop but does not.