Which of the following has contributed to the obesity problem in the United States? variation of serving sizes
distortion of serving sizes
packaging of serving sizes
labeling of serving sizes

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

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.

Which governments provide garbage collection services to homes and businesses