iGCSE Edexcel Physics Definitions Already Rated A+
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iGCSE Edexcel Physics Definitions Already Rated A+ 1. Define acceleration and describe how it changes with time. - Acceleration is the rate at which velocity changes over time. 2. Explain what air resistance (drag) is in the context of motion. - Air resistance (drag) is the force that opposes the motion of objects moving through air. 3. What does alternating current (AC) refer to? - Alternating current (AC) is an electric current that changes direction continuously. 4. What is the purpos...