If a number of little
droplets all of the same
radius r coalesce to
form a single
drop of radius R.show
that the rise in temperature
is given by
((3T)/(pJ))((1/r)−(1/R))
where T is surface tension
of water and J is mechanical
equivalent of heat
The points A, B, C represent the complex numbers z_1 , z_2 , z_3
respectively. And G is the centroid of the triangle A B C, if
4z_1 + z_2 + z_3 = 0, show that the origin is the mid point of AG.