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Please could you do the following.

1. identify the independent, dependent and control variables for the spinners experiment. 

remember, you are dropping the spinner from a certain height, timing how long until it hits the floor, and then changing the length of the wings, before repeating the test.

2. write a method explaining the process you intend to follow and the measurements you intend to record.

3. think about how you can improve accuracy and reliability. 

Please don't hesitate to ask questions, especially about number 3 if you are unsure.

cheers

Mr Clarke