Two triangular wedges are glued together as shown in the following figure. The stress acting normal to the interface, $${\sigma _n}$$ is _____$$MPa.$$

For the beam shown below, the stiffness coefficient $${K_{22}}$$ can be written as

For formation of collapse mechanism in the following figure, the minimum value of $${{P_u}}$$ is $$c{M_P}/L.$$ $${M_P}$$ and $$3{M_P}$$ denote the plastic moment capacities of beam sections as shown in this figure. The value of $$c$$ is ________.

For the beam shown below, the value of the support moment
$$M$$ is ____________ $$KN$$-$$m$$.