1. The problem statement, all variables and given/known data Plan an investigation to evaluate wind power as an energy source with equipment: • model wind turbine • multimeter to measure the voltage generated • anemometer to measure wind speed • hair dryer to generate wind power, set on cold • metre rule to measure distance. (i) Explain the aim of your investigation. (ii) Explain what you will measure. (iii) Explain the number and range of readings that you will take. (iv) Explain the independent variable. (v) Explain the dependent variable. (vi) Explain the control variables. (vii) Explain how you will make your experiment a fair test. (viii) Draw out a results table that you would use in your investigation. (ix) Write an evaluation identifying aspects of your experiment where modifications are possible. 2. Relevant equations Section of High School physics book that I am reading is titled "Energy resources and energy generation" 3. The attempt at a solution (i) Aim of investigation is to find out how increasing or decreasing wind speed changes the power output of the wind turbine. Hence decide if a light wind (hair dryer at a low setting) in an average town would be a good alternative fuel OR if only high winds (on a hill on in the sea) would generate adequate power. (ii) The turbine is effectively a battery so I would find out the voltage output of the turbine by connecting the voltmeter in parallel with it + connect an ammeter in series to find the current supplied. With voltage and current know I will know the power generated by the turbine from the formula P=IV I would measure the distance of hairdryer from turbine. The shorter the distance the more wind (if i can't just control the wind with a button on the side of the dryer). (iii) Number and range of readings : Repeat 3 times (DON'T KNOW WHY - just sounds right). Maybe measure the distance of the hairdryer from the turbine. (iv) Independent variable is the voltage output (and current supplied ??). (v) Dependent variable is the distance of hair drier from the turbine (i.e strength of wind) (vi) Control variable is the distance of hair dryer from turbine. (vii) To make the experiment a fair test : repeat the experiment 3 times ??? Use the same same sized blades on the turbine for each change of wind speed. (viii) Table used in investigation would include list of voltages produced, current flowing, distance of hairdryer from propellers. (ix) Evaluation of modifications would be to include a light bulb in a series circuit from generator to buld and back to generator to see how the bulb lit up with different winds.