Qualification > Queries
ANY DOUBTS HERE!!!
Ghost Of Highbury:
--- Quote from: cooldude on June 01, 2010, 08:55:47 am ---nope, nid's rite, cuz she has considered the forces acting on the barge, while the weight is the force of the gravity acting on the barge, the weight is balanced by the buoyance force acting on the barge by the water (obviously the boat and the barge will be in water :P ), just think as though the boat and the barge was on the ground, the normal force wud balance the weight of the barge and in this case the buoyance force does that
--- End quote ---
ok but many questions, like question 6...(same ex. 4A, q6) ...v had to take the weight into consideration!
is it something like, v dont consider the weight, wen two forces are acting on the object in the same direction.?? like here, two tugboats so no weight, but in q6...there are again 2 forces...push and pull...so while calculating the Normal contact force..y do we take the weight too??
cooldude:
--- Quote from: A@di on June 01, 2010, 10:06:26 am ---ok but many questions, like question 6...(same ex. 4A, q6) ...v had to take the weight into consideration!
is it something like, v dont consider the weight, wen two forces are acting on the object in the same direction.?? like here, two tugboats so no weight, but in q6...there are again 2 forces...push and pull...so while calculating the Normal contact force..y do we take the weight too??
--- End quote ---
yeah we gotta consider the weight in this, as the q is to find the normal force, thus we assume that the weight is not balanced by the component of the tension acting upwards, however in the q u asked previously we have to consider the weight and the buoyance force equal as the q has not been asked to consider the normal force.
sweetie:
i need help in chem. ppr1( CIE)
May07
Q26, 28
nid404:
--- Quote from: sweetie on June 02, 2010, 10:43:06 pm ---i need help in chem. ppr1( CIE)
May07
Q26, 28
--- End quote ---
26) You really have to draw and check. The OH should be tertiary(since it doesn't react with MnO4) Try making alcohols with the 5,6,7 and 8 carbons with a tertiary alcohol and a chiral carbon...
28) It has to be an aldehyde or a ketone to react with 2,4 DNP. so it's either B or C. Now to decolorise manganate ions, it has to form a carboxylic acid, which will happen only when an aldehyde is oxidised...so it's C.
thecandydoll:
CIE AS CHEM PAPER 1.
Q5.
How do you get the answer explain?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version