What are the problems Evaluate data and working associated with the use methods. of concrete? Recognise random and Why aren’t other systematic errors; identify materials with a higher their causes. or lower specific heat Identify causes of capacity used? uncertainty in final calculated values and suggest ways of reducing the inaccuracies to improve the accuracy of the calculated values. 6.1.1.4 The power rating of Power is defined as the Applications, implications Planning an approach: Work done: 1 an appliance states rate at which energy is and cultural understanding. Investigating power. Find out the rate that transferred or the rate at Developing argument: how much power students energy is being which work is done. Evaluate the benefits and have by getting them to transferred or the drawbacks of using lower perform simple tasks. rate at which work power devices such as Examples could include is done. compact fluorescent lamps walking up a flight of stairs, Equations for (CFLs). lifting masses up a known power as the rate height and pulling an object Calculations: of transfer of across a floor. For each case energy or work out calculations to the students need to know the done should be work done and the time taken. determine power, using P, in watts, W known. energy transferred divided To introduce the equation for by time and work done Energy transferred, E, in work done by a force section divided by time. joules, J 6.5.2 needs to be covered. Time, t, in seconds, s Work done, W, in joules, J
What are the problems associated with the use of concrete? Why aren’t other materials with a higher or lower specific heat capacity used? Evaluate data and working methods. Recognise random and systematic errors; identify their causes. Identify causes of uncertainty in final calculated values and suggest ways of reducing the inaccuracies to improve the accuracy of the calculated values. 6.1.1.4 The power rating of an appliance states the rate that energy is being transferred or the rate at which work is done. Equations for power as the rate of transfer of energy or work done should be known. Power is defined as the rate at which energy is transferred or the rate at which work is done. P, in watts, W Energy transferred, E, in joules, J Time, t, in seconds, s Work done, W, in joules, J 1 Applications, implications and cultural understanding. Developing argument: Evaluate the benefits and drawbacks of using lower power devices such as compact fluorescent lamps (CFLs). Calculations: out calculations to determine power, using energy transferred divided by time and work done divided by time. Planning an approach: Investigating power. Find out how much power students have by getting them to perform simple tasks. Examples could include walking up a flight of stairs, lifting masses up a known height and pulling an object across a floor. For each case the students need to know the work done and the time taken. To introduce the equation for work done by a force section 6.5.2 needs to be covered. Work done:
AQA-8464F-SOW-ENERGY.DOCX