221 prompts matching "Efficiency, and why no machine is perfect"
Quiz: The law of universal gravitation as Newton stated it
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Practice set: The field around a straight current-carrying wire
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Practice set: The gravitational field reviewed
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Practice set: The effects of an electric current
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Physics at work: Electromotive force in Nigerian power generation
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Quiz: Current in a series circuit
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Practice set: Solving a series circuit problem from end to end
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Quiz: Current in a parallel circuit
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Practice set: Solving a parallel circuit problem from end to end
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Physics at work: Circuit design work in Nigeria
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Quiz: Faraday's laws of electromagnetic induction
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Practice set: The factors affecting the size of an induced e.m.f.
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Practice set: Electromagnetic induction reviewed
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Exam prep: The magnetic effect of an electric current reviewed
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Practice set: The force between two parallel current-carrying conductors
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Exam prep: The models of the atom compared, from Thomson to Bohr
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Quiz: Nuclear fusion in the core of a star
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Exam prep: The sun as a typical star
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Exam prep: Cosmic microwave background radiation
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Exam prep: A mixed paper across the whole SS2 Physics syllabus
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