General
Easy
Physics-

Three identical particles are joined together by a thread as shown in figure. All the three particles are moving in a horizontal plane. If the velocity of the outermost particle is v subscript 0 end subscript, then the ratio of tensions in the three sections of the string is

Physics-General

  1. 3 blank colon 5 blank colon 6    
  2. 7 blank colon 11 blank colon 6    
  3. 3 blank colon 5 blank colon 7    
  4. 3 blank colon 4 blank colon 5    

    Answer:The correct answer is: 3 blank colon 5 blank colon 6Let omega is the angular speed of revolution

    T subscript 3 end subscript equals m omega to the power of 2 end exponent 3 l
    T subscript 2 end subscript minus T subscript 3 end subscript equals m omega to the power of 2 end exponent 2 l rightwards double arrow T subscript 2 end subscript equals m omega to the power of 2 end exponent 5 l
    T subscript 1 end subscript minus T subscript 2 end subscript equals m omega to the power of 2 end exponent l rightwards double arrow T subscript 1 end subscript equals m omega to the power of 2 end exponent 6 l
    T subscript 3 end subscript colon T subscript 2 end subscript colon T subscript 1 end subscript equals 3 blank colon 5 blank colon 6

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    equals left parenthesis m u sin invisible function application theta right parenthesis cross times fraction numerator u to the power of 2 end exponent sin invisible function application 2 theta over denominator g end fraction
    equals fraction numerator m u to the power of 3 end exponent sin invisible function application theta sin invisible function application 2 theta over denominator g end fraction
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    A weightless thread can bear tension up to3.7 blank k g wt. A stone of mass 500 blank g m s is tied to it and revolved in a circular path of radius 4 blank m in a vertical plane. If g equals 10 blank m s to the power of negative 2 end exponent , then the maximum angular velocity of the stone will be

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    physics-General
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    The major product obtained on monobromination (with Br2/ FeBr3) of the following compound A is

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    chemistry-General
    Since both OCH3 and CH3 are o. p directing, the following products are possible

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    chemistry-

    Out of phenoxide and ethnocide ion, only ethoxide ion will react with iodoethane to give diethyl ether C subscript 2 end subscript H subscript 5 end subscript I plus to the power of minus end exponent O C subscript 2 end subscript H subscript 5 end subscript rightwards arrow C subscript 2 end subscript H subscript 5 end subscript minus O minus C subscript 2 end subscript H subscript 5 end subscript plus I to the power of minus end exponent

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