250 prompts matching "What the centre of mass is"
Exam timing: Working an SS2 Physics paper against the clock
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Exam prep: Snell's law and the refractive index
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Worked example: The compound microscope and how it forms an image
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Practice set: The astronomical telescope
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Exam prep: The camera, and how it compares with the eye
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Real-life Nigeria: Choosing the right optical instrument for a given task
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Quiz: Radio waves and microwaves and their uses
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Worked example: X-rays and gamma rays, their uses and their dangers
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Practice set: The properties common to all electromagnetic waves
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Exam prep: Calculating frequency and wavelength from the wave speed
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Quiz: Vibration in strings and the factors affecting the frequency
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Practice set: Cohesion, adhesion and the forces between molecules
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Exam prep: Surface tension and the effects it produces
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Real-life Nigeria: Satellites and the orbits they keep
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Exam prep: The earth's magnetic field and the compass
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Quiz: Magnetic field lines and their properties
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Worked example: The neutral point, and where it occurs
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Practice set: The field around a straight current-carrying wire
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Exam prep: The field around a solenoid and the right-hand grip rule
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Spot my mistake: Magnetic flux and magnetic flux density
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