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27. Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate ? (a) The number of free electrons for conduction is significant only in Si and ...

If a charge q is placed at the centre of line joining two equal like charges Q,the system will be in equilibrium if q is a) -Q/2 b) -Q/4 c) +Q/2 d) +4Q Plz explain yur ans ...... ...

Let f(x) be a funcn. differentiable on [ 0 , a ] such that f(0) = 1 , f(a) = 31/6 . If f'(x) is greater than equal to [f(x)]4 + [f(x)]-2 , then the max. value of a is: (a) pi/6 (b) pi/12 (c) pi/24 (d) pi/36 ...

Why does the characteristic spectrum(they occupy the peaks) have more relative intensity than Continous spectrum?Secondly why does Kalpha occupy a higher peak than Kbeta whereas the energy gap in the latter case is more? ...

Ionisation energy of He+ is 19.6 × 10–18 J/atom. The energy of the first stationary state (n = 1) of Li2+ is? Using E = -2.18 x 10^-18 * Z2/n2 gives a wrong answer. What is the problem? ...

draw the graph of y=ax-(1/(bx)) where x=1/√(ab). ...

plzzz help me out with the basics of SHM & WAVES.... I am stilll very weak in this topic of physics... help me out with the basics of the topic... ...

Six charges 3 positive charges and three negative of equal magnitude are to be placed at the vertices of a regular hexagon such that the electric field at O is double the electric field when only one positive charge of same m ...

ISAT 2011 official answer key has been released http://www.iist.ac.in/isat2011/template/default/download/ISAT2011_ANSWER_KEY.pdf ...

Which of these definitions is correct. ML khanna says a square matrix is called nilpotent matrix if Ak=O,where 'k' is a positive integer,smallest value of k is called index of nilpotent matrix SK goyal in Arihant algebra says ...

1. A solid cylinder of mass " M " and radius " R " and height " R " has a helical groove cut on it's surface with a helix angle of tan^{-1}\frac{1}{2\pi} . It can freely rotate about a vertical axis passing through the center ...

hello,im getting an old Arihant Integral Calculus of Amit M Agarwal for 70rs only :D should i buy it ,but its of 2002 edition! ...

In IIT 2011, There was a question of Harmonic motion motion where and E is applied in right direction for the positively charged block. Now, There the frequency did not change and only mean position changed. However when the ...

i found chem easy...dunno about phy and maths..u guys comment.. ...

The following Question is of Assertion and Reason type. Select the correct choice from the following options. Statement 1: The probability for the graph of 16x2 + 8(a+5)x -7 a - 5 in the interval is strictly above the x-axis ...

The probability that two integers chosen at random and their product will have the same last digit is? ...

I was going through Play with graphs. There the graph of \sin^{-1} sinx is given . Though the graph happens to be okay. I got one problem. IT SUGGESTS students to learn defination of it like x+2Î ; -5Î /2<= x<= -3Î /2 - ...

Let f(x) = x2 − 2x. How many distinct real numbers "c" satisfy f(f(f(f(c)))) = 3? ...

so i recently bought Arihant Algebra by SK goyal as many people recommended it as best book for algebra. I started doing matrices from it & what i find is,it has lot of mistakes in theory. Havent done any problem yet so cant ...

is 2.222...........= 10*(0.2222........) because 2.2222.... contains some infinite digits and 0.222.... contains another infinite digits also so, some infinite value = another infinite value ...

Particles P and Q of mass 20gm and 40 gm respectively are simultaneously projected from points A and B on the ground.The initial velocities of P and Q make 45° and 135° angles with points A and B on the ground.Each particle ...

ok got it cleared myself! ...

got it thanks! ...

http://adminhelp-adnission.blogspot.com/2011/04/design-your-life-way-you-want.html ...

hey everyone hows today's srmeee paper....??how many of u attempted???hows the level of paper..what can be the cutoff? ...

Integrate {0 to π} [cotx ]dx , where [ . ] denotes the greatest integer function, is equal to? ...

On the basis of Le-Chatellier's principle, the condition that is unfavourable for the formation of SO3 is 2SO2(g) + O2(g)-----------> 2SO3(g) ; ΔH = − 42 kcal (1) low pressure (2) high pressure (3) high temperature (4) ...

In an A.P. the fourth and the seventh terms are 17 and 23 respectively. Now find 'd' and 'a'. ...

If for a system of N particles of different masses m1, m2....mN with PVs r1, r2.....rN and corresponding velocities v1, v2...vN such that Σvi = 0, then 1) The total momentum must be 0. 2) The total angular momentum must be i ...

Is 0 = 0? ...