~christina~

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**[SOLVED] joule machine..**

**1. Homework Statement**

In joule's apparatus below, the mass of each block is 1.50kg, and the insulated tank is filled with 200g of water. What is the increase in the emperature of he water after the bocks fall through a distance of 3.00m?

http://img101.imageshack.us/img101/5377/34746360en6.th.jpg [Broken]

**2. Homework Equations**

[tex]\Delta U_{total}= W_{total} [/tex]

**3. The Attempt at a Solution**

Hm...not quite sure. I would think that I need to find the calories but I'm not sure how to find that either.

I know that the work done would = potential energy from when the blocks drop the 3m but to find the change in temperature would I use this equation ([tex]Q= C\Delta T[/tex] and equate the the Q to the [tex] \Delta U[/tex] )?

I know:

h= 3.00m

m= 1.50kg

g= 9.8m/s

mass of water= 2.00g=> 0.002kg

help please..

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