base area of the object is π R1² or π R2²
As area if more in cylinder as its area is more as R1 > R2.
Hence pressure or stress = force / area = weight / base area
pressure is more for the case of object with less surface area. ie., for cone.
B) Japanese encephalitis affects brain, or parts it - and central nervous system.
C) sublime, filter and evaporate.
Put the mixture a beaker and heat it. Ammonium chloride sublimes into vapour. Collect it through a pipe and then condense it. SAnd and salt remain at the bottom of beaker.
Mix water in to the remaining mixture. Salt gets dissolved. Sand does not dissolve.
Filter very well the contents. So sand is separated.
Heat the salt solution. Evaporate the contents. So water gets evaporated and escapes. Salt remains in the beaker.