A MATLAB code for truss has been uploaded on UBLearns. The current code as demonstrated in class is able to solve for displacements and reactions only. Therefore, the first task is to update the code to obtain member forces. Then use your code to solve the 2D-truss system given below. Calculate displacements in all the nodes and the forces in all truss members. Hint : A quick hand calculation (say joint equilibrium) will help in identifying if there is any error your code.

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 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)

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object