All of the following would be questions that could be scientifically investigated except:
1. will equal sizes of styrofoam and wood have the same mass?
2. does lack of sunlight affect plant growth?
3. what is the proper number of children to have in today's family?
4. does adding salt to water raise its boiling point?

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

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.