Give the formula for calculating moments in Physics:

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Presentation transcript:

Give the formula for calculating moments in Physics: Y8 – TERM 2 REVISION Explain what is meant by density and write the formula to calculate density: Describe how you could find the centre of mass of this shape: What is meant by centre of mass? Explain, in terms of density, why cork floats on water: Explain why the bus on the right would topple: How could it be made more stable? Explain why regular coke sinks and diet coke floats: Calculate the mass of 60 cm3 of mercury. The density of mercury is 13 600 kg m-3. Find and mark the centre of mass on each of the following shapes: 1. 2. 3. Calculate the density of ethanol. 100 cm3 of ethanol has a mass of 78.9 g.

Describe, in terms of energy, particle movement and particle arrangement, the difference between solids, liquids and gases: Explain what is happening at each stage: a: b: c: d: e: Describe some factors to increase the rate of evaporation of a liquid: Describe some factors to increase the rate of condensation of a gas: Describe an experiment to find the density of a regular shape: Explain what is meant by mechanical advantage: