Hey guys here are some questions for a couple of minutes of brian storming….

I couldn’t get the answers …probably they were wrong…

But if any one has any ans to these he can post them here….

I GIVE NO GUARENTEE OF THE ANS

1.A lamp hanging from the ceiling of a carriage in a train oscillates with period T when the train is at rest. When the train goes over the crest of a hill of radius R with const speed. The period will be:

A. >T         B. <T

C. =T          D.none of these

2.Reason/assert

Trans-1-chloropropene has higher Dipole m than cis-1-chloropropeen.

Reason---The resultant in trans is less than in cis

3.The molarity and molality of an aq. Soln. of h2so4 is M1 and M2 resp.. if molar mass is M then the density is:

A.)M2(M1+M/1000)      B) M2(1/M1 + M/1000)

C) M1(1/M2 + M/1000)   D) M1(M2+M/1000)

4. If A and B are square matrices such that AB=0 than

A)det A=0 or det B=0    B) det B=0   

C)b=A^-1       D) det A=0

5. if a²+b²+c²=25,x²+y²+z²=100

and ax+by+cz=50

then (aⁿ+bⁿ+cⁿ)/(xⁿ+yⁿ+zⁿ)=

A  1           B  2ⁿ

^C   n^-2          D none

6.which of the following is non polar but contains polar bonds

a  HCl       b  H2O      c  SO3     d  NO2

7. The high Domes of ancient buildings have structural value (besides beauty). It arises on pressure diff on the two faces due to curvature(as in soap bubbles). There is a dome of radius 5m and uniform (but small).thickness…The surface tension of its masonry structure is abt 500 N/m .. Treated as hemisphere… the max weight it can support is

nearest to

a1500   b3000   c6000  d12000kg-wt

8. if two soap buubles of dif radii are connected by a tube

then air flows from

a  small-àbig

b bigàsmall

ans are

1 c

2 a

3 b

4 b

5 b

 6 a

7 b

 8 b

remember guys most of my ans r commin dif so do put ur soln 4 ur ans

1. As train goes over hill at constant speed , it experiences a force , downwards. This centripetal force arises maybe due to friction or some force but we need not worry abt the cause, as its given to be somehow at constant speed. So, overall , final force downward is greater, which can be assumed to be another 'g'. Therefore, as g increases, T decreases.(from )

Q3.             Molarity is moles/liter

                   Molality is moles/kg

         Equating dimensionally,we get the answer as c.