changes, energy is transfers could be an additional energy, kinetic energy dissipated so that it is stored discussion question); a Bunsen and elastic potential in less useful ways burner heating water (include a energy when the ball thermometer clamped to show deforms on hitting the the temperature - heated water bench. As before, all will need to be replaced by cold the gravitational water regularly); sonometer or potential energy stringed instrument (the originally stored in the instructions should include ball is eventually pausing when the string is dissipated to the stretched so that elastic surroundings by potential energy is included.) heating. Equipment: Pendulum: clamp and stand; weight; string or thread Bouncing ball: ball that bounces several times before stopping Digital Explaining properties animation CP3b energy P1.38 Calculate efficiency in Draw two Sankey Students work out the efficiency Find one or more news efficiency energy transfers, and diagrams on the board of an electric kettle by reports on the internet explain how efficiency can for similar appliances with measuring the time taken to from 2014 when an be increased the same energy inputs boil water. Students then upper limit on the P1.39 but different proportions calculate the efficiency of the power of new vacuum Recall and use the equation: of useful and wasted kettle in boiling the water. cleaners was imposed energies output. and resulted in panic efficiency = (useful energy Kettle efficiencies should buying before the transferred by the device) generally be quite high (of the deadline. Explain that
changes, energy is dissipated so that it is stored in less useful ways transfers could be an additional discussion question); a Bunsen burner heating water (include a thermometer clamped to show the temperature - heated water will need to be replaced by cold water regularly); sonometer or stringed instrument (the instructions should include pausing when the string is stretched so that elastic potential energy is included.) energy, kinetic energy and elastic potential energy when the ball deforms on hitting the bench. As before, all the gravitational potential energy originally stored in the ball is eventually dissipated to the surroundings by heating. Equipment: Pendulum: clamp and stand; weight; string or thread Bouncing ball: ball that bounces several times before stopping Digital Explaining properties animation CP3b energy efficiency P1.38 P1.39 Calculate efficiency in energy transfers, and explain how efficiency can be increased Recall and use the equation: efficiency = (useful energy transferred by the device) Draw two Sankey diagrams on the board for similar appliances with the same energy inputs but different proportions of useful and wasted energies output. Students work out the efficiency of an electric kettle by measuring the time taken to boil water. Students then calculate the efficiency of the kettle in boiling the water. Kettle efficiencies should generally be quite high (of the Find one or more news reports on the internet from 2014 when an upper limit on the power of new vacuum cleaners was imposed and resulted in panic buying before the deadline. Explain that
GCSE-9-1-Science-Term-2-detailed-planning-document.docx