Ancient physicists tried to determine the orbits of the planets every night they carefully track the location of the planets and stars be observed what type of investigation were the physicist conducting

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.

Ain is , is 's of ? 0.62 0.79 1.27 1.50

Which of the following is the best name for mgcl2