Physics 103A electrical equivalent of heat - INTRODUCTION The total amount of energy in an isolated system remains constant over time accordingly to the

Physics 103A electrical equivalent of heat - INTRODUCTION...

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INTRODUCTION The total amount of energy in an isolated system remains constant over time accordingly to the law of conservation energy. Energy can be transformed from one form to another, but not be created or destroyed. Objective: This lab is meant to create an understanding of Conservation of Energy. Laws Equations: 1. E = Pt 2. P =IV 3. Q= mc ∆T = m w c w ( T f T i ) + m c c c ( T f T i ) 4. IVt = m w c w ( T f T i ) + m c c c ( T f T i ) EXPERIMENTAL PROCEDURE The experiment begins with measuring the mass of the empty inner cup of the calorimeter and filling it up with 250ml of water. In the calorimeter is inscribed “W.E. 2.5G” which means is the number of grams of water which has the heating value equivalent to the materials of the aforementioned parts. Next, placed the lid with a heating coil and a stirrer on the calorimeter. Turn on the power supply and adjust the output voltage so that the ammeter reads approximately 1.5 amps. Then, measure voltage level from the voltmeter and the initial temperature of the water. Leave the power supply on for 20 minutes.
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