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Anthony Leung Block E Bow and Arrow Lab - Efficiency Research Question: How does efficiency with which the bow transfers energy to the arrow depend on the mass of the arrow? Hypothesis: Efficiency will increase as the mass of the arrow increases, as Eff= Eout/ Ein. Variables: Independent - the mass of the arrow. In this procedure, this variable was calculated by weighing with an electronic balance to ascertain and acquire the margin of error. A series of different massed arrows were used to determine the change in efficiency of the energy transfer from the bow and to increase the level of precision. Dependent - efficiency with which the bow transfers energy. The dependent variable is the resultant, or the value that we are attempting to measure. As the equipment to measure this is out of our reach, we can only to calculate this value. Controlled - the height of the bow. The height of the bow...

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