Answer :
Final answer:
Heat flux is calculated by dividing the power by the cross-sectional area of the material. In this scenario, the heat flux through the copper rod is 400 W/m² , which is option c.
Explanation:
Heat flux is the rate of heat transfer per unit area. In this case, the heat flux passing through the copper rod can be calculated by dividing the power by the cross-sectional area of the rod. Given 4000 Joules per second and an area of 10 cm2, the heat flux is 400 W/m2 (c).
