250 prompts matching "Why Nigerian mains is quoted as 220 volts"
Quiz: Rectilinear propagation and the formation of shadows
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Let me explain: The laws of reflection at a plane mirror
I have just studied the laws of reflection at a plane mirror in my SS2 Physics class. Let
Worked example: Image formation in a plane mirror
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Practice set: Refraction of light and the change of speed between media
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Exam prep: Snell's law and the refractive index
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Let me explain: The simple microscope and its magnification
I have just studied the simple microscope and its magnification in my SS2 Physics class. L
Worked example: The compound microscope and how it forms an image
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Exam prep: The camera, and how it compares with the eye
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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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Worked example: Calculating the speed of sound from an echo
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Exam prep: The frequency, wavelength and amplitude of a sound wave
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Quiz: Vibration in strings and the factors affecting the frequency
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Let me explain: Vibration in air columns, in open and closed pipes
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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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Quiz: Brownian motion and what it demonstrates
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Practice set: Cohesion, adhesion and the forces between molecules
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