Convert 8.34 x 10^2 lb/ft^3 to kg /m^3

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a=c and then d= c because of the band so you get ac/dc and you add them together you get sound waves

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this

condenser is used to focus in the light microscope.