Recent content by theodore100

ok, this is interesting.. it might be more like 24 W/m^2 K so the answer could be as high as 0.564 which sounds more realistic. I think I have the right approach, which is the main thing. Thanks.

No, I wasn't given h, I googled it.. so yes, it might be wrong.

I'm guessing that the area has to be in m and 0.5 cm^2 is 5*10^-5 m^2 ?

I get the same answer: c in J/kg/K = 1800 T1-T0 = (-0.2 * 5*10^-5 * 85) / (1800 * 1*10^-4) = -0.0047

Hi and thanks for the welcome. I have got my units a bit mixed up, but the 0.1 is for the c * m calculation, c being in units of J/g/K. I will try it again with everything in Kg.

Homework Statement What is the expected temperature change during one second of a polypropylene solid with mass 0.1 g at 105 degC to air at 20 degCHomework Equations heat transfer: Q= c m (T1-T0) where Q = amount of heat c = specific heat capacity = 1.8 J/g/K m = mass T1-T0 = change in...