Matt+D

Wonderful Water 1.**Water molar mass is relativly low at 18.015 g/mol, compaired to Sulfur's S8 molecule at 256.5240 g/mol. Molar mass is the mass of a certian molecule per one mole of that molecule. [], []
 * __Wiki assignments__
 * 2.** 0.997044g/cm³ is waters density at room temp. This righ in the middle, considering gold's density 19.282 (g/cm³) but hydrogen 0.00008988 (g/cm³). Density is the mass of a defined space. []
 * 3.**Water at 20°C has a surface tension of 72.8 dynes/cm compared to 22.3 for ethyl alcohol and 465 for mercury. Surface tention is the force that pushes back on an object. For an object to sink it must over come the pressure pushing it back up. []
 * 4.**Because water is less dense that gold it is also a worse heat conductior. The more dense and object it the better conductor it is.http://www.mansfieldct.org/schools/MMS/staff/hand/convcondrad.htm
 * 5.**The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C which is higher than any other common substance.http://hyperphysics.phy-astr.gsu.edu/hbase/thermo/spht.html

1.**[] In this video some kids are shooting a can a shook up soda with an airsoft gun. As the second pellet strikes the can it creats a hole so the pressured gass inside the contained volume is escaping because the confined volume in now broken. As it escapes the pressure decreases so it stops comming out in such a powerful jet. In this video a bowl of liquid nitrogen it tossed into a pool. As the freezimg cold liquid hits the water it rapidly heats up and as it does its volum increases greating a gaseous fog over the water. This video combinds both of the top two videos. First Liquid nitrogen is placed in a pop bottle and he cap is screwed on. As the liquid boild it forms a gas that increases the pressure inside the bottle. When the bottle can no longer stad the pressure it burst open and makes the watermelon burst along with it because the volume is not large enought to contain the pressure of the rapidly expandng gas.
 * Gas Laws in the real world
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- I choose this talk because i am very interested in astrology. - In this talk, Andrea Ghez is trying to prove that there is a supermassive black hole at the center of our universe. To do this she has used a megatelescope that has a correction lens to correct the stream of the atmoshphere. With the data found over a 15 year experimenit, her and othe scientist have found that there are many stars in an area about the size of our solar system that's mass is 40 million times more massive than the sun in the center of the universe. So with the power of a suppermassive black hole with a very lage mass in a very small amount of space these stars are orbiting around once ever 15 years which is relativly fast seeing that it take our sun billions of years. -I was very surprised to hear this because i had no clue that black holes were so close to earth (in our own universe!!!!) I found this has only increased my questions about space and the world around me. Hope you can answer them Mr. D
 * TED presentation -** http://www.ted.com/talks/andrea_ghez_the_hunt_for_a_supermassive_black_hole.html