Both car A and car B leave school at the same time, traveling in the same direction. Car A travel at a constant speed of 80 km/h, while car B travel at a constant speed of 93 km/h. How far is car A from school 2.5 hr later?

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.