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Physics
A small block is shot into each of the four tracks as shown below. Each of the tracks rises to the same height. The speed with which the block enters the track is the same in all cases. At the highest point of the track, the normal reaction is maximum in (IIT 2001)
Chemistry
The rate constant for the first order decomposition of a certain reaction is described by the equation What is the energy of activation for this reaction? At what temperature will its half-life period be 256 minutes?
Mathematics
Show that the value of , whenever defined lies between 1/3 and 3. (IIT 1992)

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