Joule experiment
http://www.esperimentidifisica.it/phisics_laboratory/Joule/joule.html
How to do
- set the mass of the two suspended spheres in kg
- set the mass of water contained in the calorimeter (includes the equivalent mass in water of the calorimeter) in grams
- enter a value by moving the sliders or by entering the numbers in the corresponding boxes
- press the "START" button, suspended objects will be free to fall under the action of gravity;
- at the end of the fall the thermometer will mark a given temperature, greater than the initial one;
- press the "START" button to drop the masses again ;
- press the "RESET" button to reset all the initial conditions;
- press the reset button
- record the initial temperature Ti
- drop the spheres n times
- record the final temperature Tf
- calculate the work done: L = 2mgh * n ( we have 2 falling masses and the height h = 2m)
- calculate the product heat : Q =ma (Tf-Ti) * c (c: specific heat of water = 1cal / (g ° C), ma = mass of water + equivalent mass in water of the calorimeter)
- calculate j = L / Q