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Lenses: Describe how a convergent lens works: Describe how a divergent lens works:

P 3 REVISION – CHAPTER 1 – MEDICAL APPLICATIONS OF PHYSICS. X-rays: Explain what an x-ray is: Describe some of the safety issues with X-rays: Describe what a CT scanner is:. Ultrasound: Describe how an ultrasound works: Explain how an ultrasound can be used to measure distance:

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Lenses: Describe how a convergent lens works: Describe how a divergent lens works:

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  1. P3 REVISION – CHAPTER 1 – MEDICAL APPLICATIONS OF PHYSICS X-rays: Explain what an x-ray is: Describe some of the safety issues with X-rays: Describe what a CT scanner is: Ultrasound: Describe how an ultrasound works: Explain how an ultrasound can be used to measure distance: Explain some of the therapeutic uses of ultra sound: Lenses: Describe how a convergent lens works: Describe how a divergent lens works: Describe how the lens works in the eye: Endoscope: Describe how an endoscope works: Describe how we use endoscopes in medicine: KEY WORDS: Radiograph Charge-couple device CT scanner Transducer A-scan Refraction Snell’s law Refraction index Endoscope Converging lens Diverging lens Principal focus Magnifying Focal length Image ASSESSMENT: Refraction index: The refractive index of the substance, Where is the angle of incidence and is the angle of refraction.

  2. P3 REVISION – CHAPTER 2 – USING PHYSICS TO MAKE THINGS WORK Moments: Describe what a moment it: Complete the equation: Moment = ____ X perpendicular distance from the line of the force to the pivot ______ newtons ________ ______ Nm m • Moments in balance: • When a see-saw is balanced: • the anticlockwise moment due to W1 about the pivot = W1d1 • the clockwise moment due to W2about the pivot = W2d2 • Calculate W1, if W2 = 7.0N, d1 = 0.40m and d2 = 0.25m Circular motion: Explain centripetal force and the factors that affect it: Stability: Explain the following: Tractor safety: Bus tests: High chairs: Centre of mass: Describe what the centre of mass of an object is: Draw the centre of mass on these shapes: The pendulum: Describe the motion of a pendulum: The frequency of the oscillations is the number of complete cycles of oscillation per second. the time period = (in seconds, s) Hydraulics: Describe how machines use hydraulics: The formula for pressure is: Pressure (Pa or N/m2) = KEY WORDS: Load Effort Pivot Line of action Centre of mass Equilibrium Moments Resultant Pressure Pascal (Pa) Hydraulic Centripetal Oscillation Amplitude Frequncy ASSESSMENT:

  3. P3 REVISION – CHAPTER 3 – USING MAGNETIC FIELDS TO KEEP THINGS MOVING Explain how an electromagnet works: Explain Fleming’s left hand rule: Explain how an electric motor works: Explain electromagnetic induction: Explain how a transformer works: KEY WORDS: South pole North pole Magnetic pole Magnetic field lines Motor effect ‘Split-ring’ commutator Induction Transformer National grid Step-up transformer Step-down transformer The transformer equation is: = If the transformer is 100% efficient: ASSESSMENT:

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