Exercise

Suppose a steel strut having a cross$-$sectional area $4\mathrm{.}00{10}^{-4}{m}^2$ and length $2\mathrm{.}90$ m is bolted between two rigid bulkheads in the engine room of a submarine. Assume the density of the steel is the same as that of iron $(7\mathrm{.}86{10}^3\frac{kg}{m^3}).$

$($a$)$ Calculate the change in temperature of the strut if it absorbs an energy of $3\mathrm{.}00{10}^{5}J$ of thermal energy.

What is the volume of the strut? What is its density? What is its mass? $C$

$($b$)$ Calculate the compressional stress in the strut.

Follow the example. Your answer here should depend on your answer to part $($a$).$ Pa