Acylindrical powder compact with an outer diameter do and inner diameter di is to be pressed by means of single-action compaction. derive an equation analogous to eq. 7.71 that would be appropriate for this geometry. hint: for this geometry, the normal force on the compact, fn, may be represented in terms of the applied pressure as follows: f= z x p x pi ( do + di ) dh

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation