500 prompts matching "Let me explain: Why no machine reaches one hundred per cent efficiency"
Worked example: Using the lens formula to find the image distance
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Spot my mistake: Using the wrong sign convention in a lens calculation
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Worked example: Light, reflection, refraction and lenses reviewed
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Worked example: Finding the resultant of two perpendicular vectors
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Spot my mistake: Forgetting to state the direction of a resultant
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Worked example: Finding the resultant of forces acting in a line
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Spot my mistake: Assuming friction always opposes useful motion
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Spot my mistake: Using an equation of motion with the wrong sign for deceleration
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Worked example: Calculating the acceleration produced by a given force
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Worked example: Calculating the impulse delivered in a collision
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Worked example: Calculating the efficiency of an energy transfer
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Spot my mistake: Describing energy as being used up
Act as my SS1 Physics tutor. Show me a worked solution on describing energy as being used
Worked example: Calculating the heat needed to boil a mass of water
Act as my SS1 Physics tutor. Show me a full worked example on calculating the heat needed
Spot my mistake: Assuming evaporation happens only at the boiling point
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Worked example: Calculating the increase in length of a heated rod
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Spot my mistake: Forgetting to convert units before an expansivity calculation
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Worked example: A balancing problem solved using the centre of gravity
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Spot my mistake: Confusing the centre of gravity with the centre of a shape
Act as my SS1 Physics tutor. Show me a worked solution on confusing the centre of gravity
Worked example: Calculating the pressure at a given depth
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Worked example: Calculating the size of a shadow cast by a point source
Act as my SS1 Physics tutor. Show me a full worked example on calculating the size of a sh