500 prompts matching "Let me explain: Rearranging a formula safely before substituting"
Practice set: The pulley system and its velocity ratio
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Spot my mistake: Assuming a machine can be one hundred per cent efficient
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Physics at work: Machine design and maintenance as work
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Worked example: Calculating the heat needed to boil a mass of water
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Practice set: Evaporation, and how it differs from boiling
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Spot my mistake: Assuming evaporation happens only at the boiling point
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Physics at work: Refrigeration and air conditioning as trades
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Quiz: The expansion of solids, liquids and gases compared
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Worked example: Calculating the increase in length of a heated rod
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Practice set: Cubic expansivity and superficial expansivity
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Physics at work: Allowing for expansion in construction work
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Quiz: Conduction and the particles that carry it
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Practice set: Radiation, and the surfaces that emit and absorb best
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Physics at work: Insulation and building design in Nigeria
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Quiz: Locating the centre of gravity of a regular body
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Worked example: A balancing problem solved using the centre of gravity
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Practice set: Stable, unstable and neutral equilibrium
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Spot my mistake: Confusing the centre of gravity with the centre of a shape
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Physics at work: Stability in vehicle and structure design
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Worked example: Calculating the pressure at a given depth
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