Answer:
34.32 oz
Explanation:
1.- The carpet has the dimension 12 x 11 ft, so it has an area = 12 x 11 = 132 ft2
To convert the Ft2 into yd2:
9 ft2 = 1 yd2
132 ft2 = x X = (132 x1) / 9 = 14.6 yd2
2.- By now, it is now that the 39 % is burned, so obtain the 39 % of 14.6 yd2
14.6 yd2 = 100 %
x = 39 % x = (39 x 14.6) / 100 = 5.72 yd2
3.- It is known that 30 oz acrylan /yd2
30 oz = 1 yd2
x = 5.72 yd2 X = (5.72 x 30) /1 = 171.6 oz
4.- It is assume that just the 20 % of the fibers has HCN
171.6 oz = 100 %
x = 20 % X = (20 x 171.6) /100 = 34.32 oz
The answer is D. Rubber. Because A, B, and C are metal materials that will insulate heat without any gaps. Hope this helped!
Ethyl Alcohol Rubbing Alcohol. The other type of rubbing alcohol consists of 97.5-100% denatured ethyl alcohol or ethanol with water. Ethyl alcoholnaturally is less toxic than isopropyl alcohol. ... In fact, in the US, additives make it as toxic asisopropyl alcohol.
Poor electrical conductors like glass, plastic, wood, etc. conduct heat mainly through vibrations among the molecules. As molecules vibrate, they bump into their neighbors from time to time, transferring some of their energy (i.e. heat). Those neighbors then bump in to some of their neighbors on the other side and transfer some of the energy to them. The process continues, and the heat is transferred through the material, but it happens quite slowly because the molecules are mostly stuck in place (because they're part of a solid material. If they were liquid or gas, they could move around more freely and transport heat more quickly. That process is called convection, rather than conduction). Anyway, metals and other good electrical conductors have the ability to transfer energy through an additional mechanism. In this case, the vibrating molecules literally shake off some of their weakly-bound electrons (which are plentiful in metals and all other good electrical conductors). These high-energy electrons then fly away and bump into other molecules or electrons, transferring the heat. Unlike entire vibrating molecules, however, individual electrons are so small that they can travel much longer distances at much, much higher speeds before they bump into anything. (It's sort of like shooting a gun in a forest. The bullet may travel several hundred feet or more before it actually strikes a tree. If you tried to drive a bus in that same forest, however, you couldn't go more than a few feet without running into something) Hope this helps :)
Henri Becquerel is the first scientist who discover evidence of radioactivity.
Maria Curie is one of the most famous scientists in the world who invented the word "radioactivity". She discovered that radioactive materials gave out rays and discovered two elements: polonium and radium, which are extraordinary active.