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Two cogged wheels of which one has 32 cogs and other has 54 cogs , work into each other. If the latter turns 80 times in three quarters of a minute , how much the latter turns??? ...

Q).Oxygen is a).a halogen b).an alkaline earth c).a noble gas d).a nonmetal ...

why and how is D2O used as a moderator in nuclear reactors??? ...

41. The value of ∫ {x .tanx . secx }/(tanx-x)2 In the answer key answer is given as A...whereas i think it should be B???????????? ...

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Let x be the LCM of 32002– 1 and 32002 + 1. Find the last digit of x. ...

Find n so that ( an+1 + bn+1 ) / (an +bn ) may be the harmonic Mean between a & b . ...

what is exactly meant by tempering and how does it occur??? ...

the friction coefficient between an athlete's shoe and ground is 0.90 .suppose a superman wears these shoes and races for 50 m . there is no upper limit on his capacity of running a) find the minimum time he will take for the ...

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The half life of Uranium is 2.5 x 105 yrs.In how many years 75% of the original amount of Uranium will be disintegrated? (a)105 yrs (b)30 yrs (c)3 x 2.5 x 105 yrs (d)2 x 2.5 x 105 yrs ...

Two identical charge particles enter a uniform magnetic field with same speed but the at angles 30° and 60° with field . Let a,b and c be the ratio of their time periods ,radii and pitches of the helical paths than (a)abc = ...

A man is moving at the speed of 3 km/h due East to him it appears that the wind is blowing from the North direction . Now if he doubles his speed. The wind appears to blow from the North east direction . Then find the magnitu ...

A rod is resting on a plane surface. As shown in figure. The coefficient of friction is u. Angle is theta. Prove that tan-1(1-u2/2u) *Image* ...

why is it said that a better and uniform crystallisation is obtained if a crystal is already placed in the solution,which when cooled crystallises and deposits on the crystal....???is it due to cohesion or something???please ...

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The sum of the following series will be- 2 - 1/2*4 - 1/4*6 - 1/6*8 - ............- 1/48*50 is: (a)2.24 (b)2 (c)1.76 (d)0 ...

A truck and a car are moving with the same K.E. on a straight line road. If their engines are turned off at the same time, which one of them will stop at a lesser distance? ...

What is optical density exactly???why is it different from the normal density???both are based on the arrangement of molecules in diff. medium....then.... ...

Can you people please name a site where I can learn about the mechanism of different simple gadgets like camera,telescope,radio etc. but with nice illustrations and simple words...please. ...

A concave lens can be converging if it is placed in a liquid of (a) R.I more than its R.I (b)R.I less than its R.I (c)both cases possible (d)never possible ...

Two cogged wheels of which one has 32 cogs and other 54 cogs work into each other.If the latter turns 80 times in three quarters of a min,how often does the other turn in 8 secs??? ...

if there are n arithmetic means between a and b,then common difference d is-(b-a)/(n+1).......how??? ...

PN, PM, and AB are tangents to the circle as shown. If PM = 11 in., then find the perimeter of ΔPAB *Image* ...

Two different no.s when divided by the same the remainders are 4 and 3.When their sum is divided by the same divisor the remainder is 1. What is the divisor? ...