need information about a copper brick that weigh 21 pounds solid copper?
143121
i dont think i understand your question.
26899
go to encarta.msn.com and search for keys mass/solid structure, surface Structure
519144
drop a concrete block on it
366793
lots of materials' properties can be found. you can try this link..
912515
Since 56 is the atomic mass of iron then the amount here is 68.7/56 moles or 1.23 moles.\nSince 1 mole of copper is 64 g then to have 1.23 moles you need 64 X 1.23 or 78.5 g.\nThe trick is that equal numbers of moles have equal numbers of atoms.
613586
For calculating weight you will be needing the specific gravity or bulk density of the material it is made of.\nElse you need a weigh balance.
446562
Flip them. If they ring, they are pre-1981. Alternatively, drop them one by one onto a hard floor. Again, if they ring, they have the higher copper content.
761593
Probably silicone and iron.   It's a friggin big rock.   Hollow it out a bit; near the center the gravity is probably near earths gravity.
208626
the side wall on the roll cage should be 5/6 mill thick that should adsorb most of the impact that's what we use  to build land rover trailers and rock claimers it will have to be mild steel where you from\n     \nwolf4128
131292
2.5 grams according to US Mint specifications.
1160656
Copper closed at about $3.25 a pound on Friday, so an 18 pound ingot is worth $58.50
804854
The density of glass is around 2.3 gm/cc or 0.85 lb/in^3.  To get the  pounds per square foot,  Multiply the thickness in inches by 12.  So a 1/8" thick piece weighs 1.5 pounds per square foot.
529427
No, copper is NOT cheap, it costs quite a bit more than aluminum pound for pound. Copper has a much lower resistance to electricity than aluminum does. When subjected to the loads household wiring have to deal with, aluminum wiring would have to be prohibitively thick to prevent overheating. Copper provides the best conductivity with the best compactness for the best price.
338365
Think this is the second time I've answered this question.\nThere's 20 pennyweight in 1 ounce, 12 troy ounces in 1 pound. 24k is solid gold but you won't find this in natural gold for it is usually alloyed with some other metal, 24k will only be found in refined gold.
903136
5 feet 9 inches; 31.8 lbs; 20.3 ft squared
85128
The average weight is 2.5 tons (much more than a VW Beetle).\n\n"The Great Pyramid of Cheops, the largest of the three at Giza, is estimated to comprise as many as 2.5 million limestone blocks with an average weight estimated at 2.5 tonnes (2.5 tons)."\n\n"The blocks used in the pyramid are large, with a commonly stated average of 2.5 tons. Many blocks are indeed smaller than this, the blocks toward the top decrease in size.  Some of the casing stones at the base are very large, weighing as much as 15 tons. The heaviest blocks are the granite blocks used to roof the kings chambers and the weight relieving chambers above the king’s chamber. These are estimated to weigh from 50 to 80 tons each"
312260
It's about 10 lbs per square foot. (Multiply the density of steel, about 490 pounds per cubic foot, times the thickness of the plate in feet, 1/4 in. = .02 ft.) I'm assuming you mean 1/4 in. plate.