Two circular rods, both of length l and having the same diameter, are placed end to end between rigid supports with no initial stress in the rods. the coefficient of linear expansion and young's modulus for rod a are αa and ya respectively; those for rod b are αb and yb respectively. both rods are "normal" materials with α> 0. the temperature of the rods is now raised by δt.

what is the stress f/a in the rods after heating? express the stress in terms of ? a, ? b, ya, yb, and ? t.

Ithink the answer would be a

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Answerthe energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.explanationwe define electric potential as the ratio electric potential energy to the charge,    then the following gives us the potential difference,      the formula  may be on your formula sheet.the change in electric potential energy would be the energy that would needed to move it from point a to point b. solving for that, we get    using q = 8.00  × 10⁻¹⁹ c and  δv = 2.00 v, we get    the energy required is 1.60 × 10⁻¹⁸ j, to three significant figures.