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two rods of equal length, Rod-1 along X-axis and Rod-2 along the Y-axis are placed in such a way that the mid points of the two rods are at the origin and the mid points are welded at the mid point. the rod-1 move with a velo ...
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three equal weights A,B,C each of mass m are hanging on a string passing over a fixed pulley. the tension of the string between B & C is???? *Image* ...
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what is the tension of the rope that connects the two blocks of masses M & m. given that the co-efficient of friction between the surface and each of the block is μ *Image* ...
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the argument of (1- i 3 ) is (1+ i 3 ) A) 60° B) 120° C) 210° D) 240° i got the answer as 240° but the book ans says it is 60°.... 'am baffled!! ...
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a balloon of mass m is found to accelerate up at the rate of g/6. the quantity of water that should be put inside the balloon so that it may accelerate downwards at the rate of g/6 is: ...
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i just could not understand the formation of crystals. the unit cube of CsCl is made of one Cs at the centre with eight Cl around it. our teacher explained it that the Cl atoms at the corners are shared and so the net no. of ...
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a stone is thrown horizontally with velocity of 10 m/s. the radius of curvature at the end of 3 seconds is ??? ...
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guys, a couple of years back, when i attended the Ntse interview they asked me this question for which i openly admitted that i do not know the and the ques was "what is the reaction between NH3and Mg?" till this date i dont ...
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a 1.0*10-3 moles of chloride of an element X is completely hydrolysed. It ws found that the resulting solution required 20 ml of 0.1 N AgNO3 for complete precipitation of the chloride. then X could be (A) Al (B) P (C) Si (D) ...
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0.5 g of fuming H2SO4 (oleum) is diluted with water. This solution is completely neutralized by 26.7 ml of 0.4 N NaOH. The % of free SO3 in the solution is (A) 20.6% (B) 26% (C) 30% (D) 19% ...
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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 ...
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in test no 514 Q5 The sum of the protons and neutrons in an atom is its a) atomic number b) atomic weight c) atomic energy d) none Your Answer: (d) Correct Answer: (b) Score: -1 Explaination : it is atomic wt. is it right???? ...
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the dimensional formula M L^2 Q^-1 T^-1corresponds to? (A) magnetic flux (B)electric flux (C) energy density in e.m waves (D) inductance ...
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a vernier calliper is used to measure the length of a cylinder.10 divisions of vernier scale coincides with 9 divisions of the main scale. the best suited length (measured) is?? ...
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if 1,w w2 are cube roots of unity,then the value of(1+w2-w)(1-w2+w) ...
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consider a metal disc with a hole in the centre. when the disc is heated will the radius of the hole at centre increase or decrease? ...
