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Hi Umang

Thanks for ur appreciation

My name is K.GOUTHAM HARSHA

C'mon, then explain this:

why don't we say that there might be another acceleration provided bcos of the force the gun exerts????????

I think the ans is (d) He will remain standing

Bcos when the gravity acts, then due to the contact with the Earth's surface, we have, N-mg=0 i.e no net force acts on the body.

When the gravity disappears, we have mg=0 (trivial) and we know that normal force acts when there is some press between two surfaces (in the above case, due to pressing caused by weight).

In this case bcos gravity disappears, there is no press and hence,N=0

i.e, even in this case, we have net force=0 just as in the above case. So, there won't be any change in the body's position. So, the ans is (d)....KGHEDRIU

Hi Tejaswi,

I am Goutham Harsha(kghedriu).Looks like u know much about organic.Though I know about reference books,I am a bit weak in organic when compared to other subjects. So, pleeeeeze help me out.U can send ur suugestions right here or maik me to 'kgh_alcadeias@yahoo.co.in' Please reply quickly. Hey, if u dont mind can u give me ur email id? kghedriu

As far as I know, for bits, the new pattern chemistry of Arihant is nice for bits.To get thorough in concepts, Solomon is good. For higher levels of organic, Morrison is wonderful.

Its 2 simple. dQ=nCpdT is valid only if the process is isobaric bcos Cp means specific heat at constant pressure. The constant formulae are for dU and dW and the formula for dQ is OBTAINED BY SUBSTITUTING THE VALUES OF dU AND dW ACCORDING TO THE PROCESS. Hence u were in a misconception and the eqn u wrote is actually nCvdT=nCvdT (bcos it is an isochoric process where volume is constant, u need to use dQ=nCvdT DONT HESITATE TO ASK ANY MORE DOUBTS........KGHEDRIU.

n is proportional to 1/u is correct. Bcos, lets consider a quantity 1000g . Whether u express it as 1000g or 1kg makes no difference.i.e, u r using the law of equivalency . i.e, as u r making the unit larger, u r making the numerical value smaller so as to maintain the balance of quantity. Hence (d) is correct.

Magnification by 'n' times means increasing the overall dimensions of the object by 'n' tines. Hence in this sum, the actual dimensions can be given if the observed dimensions are diminished by 100 times. Hence we have the ans to be 3.5/100=.035mm

First of all, for a physical quantity to exist, in this case, a shouldnot be zero. Hence, d should be correct.

Vector is a concept introduced to exactly explain the behaviour of a particke. For eg, supposing u hav a body moving in the XYplane, to locate the instantaneous position, u need its co-ordinates. But, they dont exactly tell u the would be position, i.e, u dont know its direction. To make such aspects clear, we use a quantity that shows both its magnitude and direction. People call this a VECTOR. Dimensions are the regions u divide the space into so as to express ur views about the behaviour of a particle clearly.

SIMPLE, just as we r familiar with the 3-dimensional system,,, we can assume the system of 'n' base quantities as a 'n'-dimensional system consisting of 'n'axes,which represent n base quantities . They are clearly independent by def. Now, a derived quantity is a point in space and by plotting their perpendiculars, we can clearly say that all (a,b,c) are trivial. NOTE: The existance of 'n' dimensional system was explained by EUCLID centuries ago.(d) cant be correct if the quantity lies on one of the axes. kghedriu

To solve sums related to circ motion, all you need to do is convert the cum into uni dimension by resolving the given parameters into two perpendicular dns ,one along the tangent and the other along its normal. Now, it becomes a simple sum because the two dns are independent. for a clear understanding, follow the book MECHANICS AND THERMODYNAMICS BY BASAVARAJU AND GHOSH IN pg40-44 , 76-79 (in 40-44, u'll find the most general case of circ motion, i.e curvilinear motion) K.GOUTHAM HARSHA,kghedriu

I want to sincerely thank you both, SHAKIRSHAFI and SRIJAN88 for having helped me out in this regard. K.GOUTHAM HARSHA(kghedriu)

Sir, please explain to me the concept of RESONANCE and how to draw resonating structures for a given compound.

answer is (b) because work done under gravity depends only on the final position but not on the path using which you reached it and hence independent of the horizontal displacement. If my ans. is wrong please correct it.