Physics Discussion HERE ONLY!

[annie_angel]

for state...waz it the que. abt da truck?

[Diablo]

The direction of the resultant was obvious north east but for example "state the Critical Angle" I wrote "more than 35 [degrees]"

[attal]

for the diode thing i wrote D !!!!

[IG_ICE09]

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!

[tmisterr]

i chooose aluminium as the metal, and for the diode, the answere is A, the last question, the electric fiel i wrote it should act downwards to cancel it out. for the direction of the force i wrote diagonal to the road!! i didn't know how else to express it. did any1 get the Piston question 1? Cause on my paper there was nothing like Gm or Micrometer???

[Diablo]

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!

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!!!!!! 

[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

[esso]

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?

nd because water is already poor conductor of heat...so no heat flows in or out..

[....]

am i the only one who actually wrote 30 degrees to direction of road?  

[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?

nd because water is already poor conductor of heat...so no heat flows in or out..

lolll ok, few marks lost then

[esum0209]

am i the only one who actually wrote 30 degrees to direction of road?  

i got 29 degrees

[esso]

is this correct for the variation of current in da diode thing