Abasketball player jumped straight up to grab a rebound. if she was in the air for 0.80 second, how high did she jump?

a) 3.1 m
b) 0.78 m
c) 1.2 m
d) 0.50 m

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.