Footing: This is a 3 m wide strip footing, located on the ground surface of an isotropic, homogeneous layer of soil. The footing places a uniform load of 50 kPa on the ground surface. The unit weight of the soil

is 1,800 kg/m3

and the depth to ground water is 3 m below the ground surface.

Calculate, tabulate and plot all three relevant stress variations – total overburden stress, effective

overburden stress, and final effective vertical stress – on a pressure vs depth diagram

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?

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)