# Physics from creation to collapse

Jun 17th, 2015
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Investigate recognize and use the expression E=mc θ Specific heat capacity is the quantity of energy needed to raise the temperature of material, per kilogram per degree rise in temperature.

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Unit 5 Physics from creation to collapse Thermal energy Investigate recognize and use the expression E=mc Specific heat capacity is the quantity of energy needed to raise the temperature of material, per kilogram per degree rise in temperature. Specific heat capacity can be calculated using this equation , Giving the c the units Measuring specific heat capacity: 1. Weigh a block of aluminum to find its mass m and then place it in the lagging. 2. Add a small amount of cooking oil to ensure good thermal contact when the heater and thermometer and inserted 3. Take the initial temperature of the block. Switch on the power supply and start the stopwatch record the current and potential difference 4. After three minutes switch of the power supply and record the highest steady temperature reached. 5. You can than find the specific heat capacity using the equation Explain the concept of internal energy as the random distribution of potential and kinetic energy amongst molecules In gas the molecules have Kinetic energy due to their random motion. In addition molecules that are made from two or more atoms have kinetic energy due to rotation and vibration. In an ideal gas the internal energy is entirely the random kinetic energy of its molecules Ideal gas assumptions: 1. The intermolecular forces are negligible except in collision 2. That the collisions between molecules and with the wall are elastic 3.

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