Ashaft of carbon steel (aisi 1010) with a diameter of 0.1 m is heated in a gas furnace at 1200 k. the convection heat transfer coefficient is 100 w/m2. if the initial shaft temperature when entering the furnace is 300 k
a. how much time does it take for the center of the shaft to have a temperature of 800 k?
b. at the time of the answer (a) what is the difference in surface temperature and center of the axis?

the answer would be 32*f

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by