Two an electric motor weighing 2,500 n is supported on four springs, each having a stiffness of 4.4 kn/m. the rotor has a weight of 500 n with its center of mass located at a distance of 0.2 mm from the axis of rotation. assume the system has damping ratio equivalent to ? 0.2. find the amplitude of vibration of the motor and the force transmitted through the springs to the base when motor is running at 120 rpm

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?

Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure