In regions far from the entrance, fluid flow through a circular pipe is one-dimensional, and the velocity profile for the laminar flow is given by u(r) = umax(1 - r 2 / R2), where R is the radius of the pipe, r is the radial distance from the center of the pipe, and umax is the maximum flow velocity, which occurs at the center. Obtain:(a) the relation for the drag force applied by the fluid on a section of the pipe of length L and(b) the value of the drag force for water flow at 20C where R = 0.08 m, L = 15 m, umax= 3m/s, and μ= 0.0010 kg/ms.

ice to water 1 water to vapour 2 latent heat

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide