An electric motor, of mass 20 kg and operating speed 1350 rpm, is placed on a fixed-fixed steel beam. The motor has a rotating unbalance of 0.1 kg. m. The amplitude of vibration of the beam under steady-state operation of the motor is suppressed by attaching an undamped vibration absorber under the motor, as shown in the figure below. Determine the mass and stiffness of the absorber such that the amplitude of the absorber mass is less than 4 cm.

Fluids at rest possess no flow energy. a)- true b)- false

The drive force for diffusion is 7 fick's first law can be used to solve the non-steady state diffusion. a)-true b)-false

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?