Qualification > Sciences
Physics Discussion HERE ONLY!
Diablo:
--- Quote from: IG_ICE09 on June 05, 2009, 04:04:50 pm ---i think they wanted the angle of the resultant with reference to the road, as the downward force of 1 car is south...so u hav to write 30 degrees, or whatever u guyz got it may b a lil diff..
and thers no way it could be aluminum! cuz it expands more than concrete so it will cause the concrete to crack!
--- End quote ---
That's why it's placed at the bottom of concrete? because its expansion is more... as I know the metal placed below should be the one that has higher expansion.
ghostt:
the answer iz steel no aluminium cuz aluminium will damage the concrete!!!!!!!cummon itz common sense guyzz!!!!!! :P
godfather93:
ghostt is absolutely right. the answer is steel.
esum0209:
hey guys for the water and damp cloth question, is it because water have higher thermal capacity than air so when its hot weather it will not heat up much keeping the milk cool?
esso:
i choosed steel....cause it has the least expansion and as u know in concrete pillars large heat energy is emitted so temperature increase a lot nd therefore we have to get the least expansion so the the concrete pillars wont exxxxxxxplode or crack open... dats wat i think
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