Alloys/Escalators

1.

(Yikes I hope I posted in the right forum... Ah well. Here goes.)

How do I determine the composition of an alloy (of, say, two metals) from its specific heat capacity?

Can I do something like...

c1*m1*dT + c2*m2*dT = c3*(m1 + m2)*dT

Where c1, c2 and c3 are specific heat capacities (c1 and c2 for the two metals the alloy is composed of, and c3 for the entire alloy)

m1 and m2 are the masses of each of the two composing metals contained in the alloy and dT is the change in temperature.

(But dT wouldn't really matter would it...)

2. In order to determine the power an escalator exerts...

Say I know how much the system masses (let's call this m, for mass)...

And I know that there is no acceleration (the escalator moves at constant velocity)

So would the power that it would be, like:

m*g*d/t

where g = 9.81 m/s^2 and t = time

But what do I use for d? Do I take the entire length of the escalator? Or just the height?

And how would I work friction into it?

Sorry... I know that was a bit long... Thanks for any help!