Calculate the total load acting on a concrete beam of length $5$ meters and cross$-$sectional area $0\mathrm{.}1$ m$^2$ if the beam is subjected to a uniformly distributed load of $20$ kN$/$m$.$A rectangular footing of dimensions $2$ m by $3$ m supports a column load of $300$ kN$.$ Calculate the bearing pressure under the footing and the minimum depth of foundation required if the allowable bearing capacity of soil is $150$ kN$/$m$^2.$Water flows through a pipe of diameter $0\mathrm{.}3$ m with a velocity of $2$ m$/$s$.$ If the pipe branches into two pipes of diameters $0\mathrm{.}2$ m and $0\mathrm{.}1$ m$,$ calculate the velocities in each branch using the principle of continuity.Calculate the total volume of concrete required to construct a cylindrical water tank with a diameter of $5$ meters and a height of $4$ meters, assuming a concrete cover of $0\mathrm{.}1$ m$.$Calculate the deflection of a simply supported beam of length $6$ meters and cross$-$sectional area $0\mathrm{.}2$ m$^2$ if it is subjected to a concentrated load of $50$ kN at the center.what is multithreading in java?