haha yeah, just remembered: Identify THREE advances in measurement technologies, and describe how they
have improved our understanding of celestial objects.
Replied to your other post too :)
Graphite rods are used as they are unreactive unlike other substances such as copper, they can complete an electrical circuit and they provide an inert surface enabling electron exchange to occur (they allow electrons to flow) so a chemical reaction occurs...
I do astro; doesn't seem like many people do though :\
I think this question actually came up in my trials. I talked about surface temperature (i.e. blue shifted lines = higher surface temperature) and translational velocity (looking at the Doppler Shift to determine it's movement - i.e. when...
try and use that disappointment for maths to motivate you for chem- you dont want to be in the same position you were at the end of that maths exam, remember how horrible you felt and use that as incentive to study so you dont have to feel that way again.
:)
No not now, I'm going to finish like one more paper because I am not intellectually gifted like you and thus need the practice :P later this afternoon?