Aperson is standing motionless between a straight highway and an airport runway. a truck drives by the person at constant speed, while an airplane accelerated down the runway for take off. of the person, truck, and airplane, which are an inertial frame of reference? a. truck and airplane only b. person only c. person, truck, and airplane d. person and truck only

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.