In the text we investigated the parabolic velocity profile associated with the laminar flow of fluid through a circular pipe. If the pipe wall is heated in such a way that the wall heat flux is independent of the axial position (e. g. via a resistance heating element wrapped around the pipe at a constant pitch), the temperature profile within the fluid is given by

T=Ts-Co(3Rp^2/16 - r^2/4 + r^4/16Rp^2) where T is the temperature of the pipe surface and Co is a constant. ( Rp is another variable)

!. What are the dimensions for Co.

2. Sketch the temperature profile as a function of r for constant axial position

3. Compare and discuss the shapes of the temperature and velocity profiles

4. Calculate the diffusive heat flux per unit area to the pipe wall.

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg. m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?