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A metal cylinder of 5kg is heated electrically by a 20W heater in a room temp. of 20c. The cylinder temp rises and finally becomes constant at 45C. Assuming rate of heat loss is proportional to the excess temp over surroundin ...

The Product (1 + tan1°) (1 + tan2°) (1 + tan3°) ........ (1 + tan45°) equals: a) 221 b) 222 c) 223 d) 224 ...

If K= sin (pi/18) sin (5pi/18) sin ( 7pi/18) , then numerical value of K is ...

The odour of skunks is caused by chemical compounds called thiols. these compounds of which butanethiol (C4H10S) is a represntative example can be deodourised by reaction with household bleach (NaOCl) accorbing to the equatio ...

10mL of 1 N HCl is mixed with 20mL of 1M H2SO4 and 30mL of 1 M NaOH.The resultant solution has 1.20 meq of H+ions 2.20 meq of OH- 3.0 meq of H+ or OH- 4. 30 milli moles of H+ ...

*Image* Q18 (HCV). Figure shows a typical circuit for low-pass filter. An AC input Vi=10mV is applied at the left end and the output Vo is received at the right end. Find the output voltages for ν= 10kHz, 100kHz, 1.0MHz and ...

plz can someone explain me how the charges are distributed in conductors placed side by side . i know i am going wrong somewhere but yet not able to understand . sample question 3 conductors- A B C +Q 0 -2Q Find final charge ...

*Image* find the equivalent capacitance between 'a' and 'b' ..they are obviously connected to a battery. ** E of the battery isn't given. please help me out with this ques friends. my sir did this using kirchoffs loop law..i ...

\lim_{x\rightarrow \propto } [ 1^{1}+2^{1/2} + 3^{1/3} + ...... + x^{1/x} ] ...

check your result at http://cbseresults.nic.in/aieee/cbseaieee.htm AIR -337 , categoryrank (GEN) -331 state rank - 37 ..category - 31 ( state = maharashtra ) post ur ranks here ...

Which of the two has greater dipole moment - A) mono chloro methane *Image* B) tri chloro methane *Image* ...

*Image* The question:- In the arrangement m1=1kg m2= 2kg. Pulleys are massless and strings are light.For wat value of M the mass m1 moves with constant velocity?? A) 6 kg B) 4 Kg C)8 Kg D)10Kg In the 2nd pulley left one is m2 ...

Should one give a drop from NIT DGP to jadavpur? ...

Find the sum of the series:- 1+ 1/12 + 1/22 + 1+ 1/22 + 1/32 ..... 1+ 1/20072 + 1/20082 a)2008- 1/2008 b)2007- 1/2007 c)2007- 1/2008 d)2008- 1/2007 e)2008- 1/2009 ...

A spiral of two turns with inner radius R and outer radius 2R is placed as shown in figure. Find magnetic field at the centre of spiral. *Image* ...

A man started from his home at 14:30 hrs and drove to a village, arriving there when the village clock indicated 15:15 hours. After staying for 25 minutes he drove back by a different route of length (5/4) times the 1st route ...

Three vertices are chosen at randomly from seven vertices of regular seven sided polygon. Probability that they form vertices of an isosceles triangle is: a) 1/7 b) 1/3 c) 3/7 d) 3/5 ...

generalization of a past jee q Let p(x) be a polynomial over R of even degree n for which for which p(x)≥0 for all x. Prove that p(x) + p'(x) +...+ p(n)(x)≥0 for all x. source :Polynomials, E.J.Barbeau ...

Can someone tell me about the research institutes like IISER. ...

a rod of length l,mass m is hinged at origin and is slightly tilted at angle θ as shown *Image* we expect it to rotate in the clock wise direction but the torque about the orgin due two both halves is same in magnitude =mglc ...

Calculate; 1) 4cos20° - 3 cot20° 2) ( 2cos40° - cos20°)/sin 20° ...

The digit in the unit position of the integer 1!+2!+3!+.....+99! is: a)3 b)0 c)1 d)7 ...

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A cylindrical tub contains water. We are only considering one axial plane of the cylinder (one that passes through the axis) The cylinder is now rotated about it's axis with constant angular velocity. Write the equation of th ...

Q1. In a uniform magnetic field of induction B, a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequency ω. The axis of rotation is perpendicular to the field. If the ...

1))fIND THE SUM upto n terms-2 +12+36+80+150+252..... 2))if a,b,c, r in HP then bc,ca,ab r in? ...

a zinc rod weighing 25g was kept in 100ml of 1 M CuSO4 solution. after a certain time the molarity of Cu2+ in the solution was 0.8 M. the weight of zinc rod left is equal to (A) 1.308 g (B) 23.692 g (C) 25g (D) none of these ...

esinx+e-sinx=4 Find the maximum value of x. ...

Q: Two fixed charges " +q " and " -q' " are shown as in the figure. A field line emerges from +q charge at an angle ' α '. Find the angle at which it terminates at the other charge. *Image* Note: | +q | ≠| -q' | Please pos ...

I have done in rotation a Problem where we put a rotating Disc on horizontal rough platform, find the Average Torque and then solve the equation. Even the ring one is also easier. But How do I do it when there is a square sin ...