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  • Physics Factsheet: 129. Cathode Ray Oscilloscope

    Physics Factsheet: 129. Cathode Ray Oscilloscope

    A Cathode Ray Oscilloscope (CRO) is a useful tool for investigating alternating  potential difference.  The following points are covered in  this Factsheet:  • finding the p...

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  • Physics Factsheet: 130. Heat Engines and Heat Pumps

    Physics Factsheet: 130. Heat Engines and Heat Pumps

    A simple starting point for Thermal Physics is the fact that heat  naturally flows from a warmer object to a cooler object.  ...

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  • Physics Factsheet: 131. Refraction Calculations

    Physics Factsheet: 131. Refraction Calculations

    Examiners’ reports have drawn attention to weaknesses candidates  have displayed in calculations concerning light rays. Calculations  involving refraction caused most difficulties. T...

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  • Physics Factsheet: 132. Uncertainty in Practical Work

    Physics Factsheet: 132. Uncertainty in Practical Work

    This Factsheet will consider the following questions:  • How certain are you of your result?  • How accurate was the measuring device?  • How can you determine the unc...

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  • Physics Factsheet: 133. Answering Essay questions in Physics

    Physics Factsheet: 133. Answering Essay questions in Physics

    For many of you, the thought of writing an essay during an  examination is quite a frightening one. The good news is that A  Level Physics essays are rarely worth more than 7 – 9 mar...

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  • Physics Factsheet: 134. Atomic Calculations from the Bohr Model

    Physics Factsheet: 134. Atomic Calculations from the Bohr Model

    Bohr knew that the hydrogen atom consisted of a negatively charged  electron orbiting a positively charged proton but… although atoms  are small there was a very BIG problem. ...

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  • Physics Factsheet: 136. Interpreting and Using V-I Graphs

    Physics Factsheet: 136. Interpreting and Using V-I Graphs

    A V-I characteristic is a graph of how the current through a  component varies with the potential difference across it.  You need  to recall and explain the shape of three V-I charact...

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  • Physics Factsheet: 137. Mass Defect and Mass Loss

    Physics Factsheet: 137. Mass Defect and Mass Loss

    The mass of a nucleus is less** than the combined mass of its protons  and neutrons (nucleons). The missing mass is called the mass defect....

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  • Physics Factsheet: 138. Radioactive Decay Calculations

    Physics Factsheet: 138. Radioactive Decay Calculations

    The half-life is the time taken for the radioactivity (A) of a substance  to fall by half.  The original number of radioactive nuclei (N) and  mass of original substance (m) also fall...

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  • Physics Factsheet: 139. Graphical work with Electromagnetic Induction

    Physics Factsheet: 139. Graphical work with Electromagnetic Induction

    To revise our ideas on electromagnetic induction look at Fig 1,  showing a bar magnet and a coil connected to an oscilloscope (to  display potential differences). As the coil is moved (at ...

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