Recent content by sunmoonlight

say the T(O) = 90 +/- 0.5, T(t): 60 +/- 0.5, TA = 10 +/- 0.5, temp difference (T(t) - TA) is 50 degrees +/- 0.5, t= 100s 1. Is the uncertainty for ln (T(t) - TA) = 1/2*(ln50.5 - ln49.5) = +/-0.01? 2. If you substitute the values into the eqt, you get k = (ln50/80)/-100, so what's the...

I'm finding the uncertainty of k, given that each temperature has an uncertainty of +/- 0.5 degress.

I got that. Thanks a lot.

-k

ln T(t) - TA

According to this source, the gradient is k (which is a negative value)

k should be positive, but when I plotted a graph of ln (T(t) - TA) vs t, I got a graph of negative k

What's the value of k, given T(t) = 51 degrees, TA = 19 degrees, To = 80 degrees and t = 1200 s? Should the value of k be positive or negative if an object is cooling down?