because aluminium is light and they are not charging for the can just the substance thats in it
click on the thing u want 2 change go to propoties click customize go 2 change icon change icon click apply click ok
Immersion oil has a similar refractive index to glass, which helps reduce light refraction and increase resolution when viewing specimens under high magnification. By increasing the numerical aperture of the objective lens, immersion oil allows more light to be captured and produces a clearer image with improved contrast and detail.
Well I am in 8th grade and I had a project to do about this. List of Minerals: gold,iron, coal... I forgot the rest. Google it... I am sure you will find it there. I Google everything from homework to gossip. Good Luck!