Which of these is NOT a sedimentary rock?
A. shale
B. gneiss
C. limestone
D. sandstone

Silica, sio2, is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when silicon is exposed to o2 gas at an elevated temperature. at 900˚c, it takes 90 minutes for the oxygen to diffuse from the surface to form a 0.06 micron (0.06 x 10-6 m) thick layer of sio2 on

What does the cell nucleus do or, how does it function?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer