If an astronaut in space pushes off the satellite she is working on, what will happen to her if there are no other acting external forces? A) She will eventually slow down and come to a stop.

B) She will continuously speed up.

C) She will periodically change direction.

D) She will move in the same direction at the same speed forever.

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.