177 prompts matching "How a rocket accelerates by expelling mass"
Exam prep: Snell's law and the refractive index
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Spot my mistake: When light is reflected wholly back inside a denser medium
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Real-life Nigeria: Dispersion of white light and the spectrum it produces
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Physics at work: Reflection and refraction in Nigerian everyday life
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Practice set: The astronomical telescope
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Real-life Nigeria: Choosing the right optical instrument for a given task
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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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Real-life Nigeria: Radio and television broadcasting in Nigeria
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Physics at work: Mobile telephony, satellites and fibre optics
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Worked example: Calculating the speed of sound from an echo
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Practice set: Pitch, loudness and quality as properties of a musical note
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Exam prep: The frequency, wavelength and amplitude of a sound wave
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Spot my mistake: Reflection of sound and the formation of echoes
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Real-life Nigeria: Resonance and the vibration of air columns
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Physics at work: The range of human hearing, and ultrasound beyond it
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Worked example: Calculating the fundamental frequency of a stretched string
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Practice set: Overtones, harmonics and the quality of a note
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Exam prep: Noise and the effect it has on health
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