AQA Physics Unit 3 2.5 / 5 based on 5 ratings ? PhysicsGCSEAQA Created by: EmogotchiCreated on: 29-04-13 20:31 What is a 'Center of mass'? Where all the mass of an object appears to be concentrated. 1 of 6 What is the range of frequencies that the human ear can detect? 20Hz to 20000Hz 2 of 6 Why is the core of a transformer made of iron? Iron is magnetically soft 3 of 6 If there are more primary coils than secondary coils on a transformer what kind of transformer is it? A step up transformer 4 of 6 Is the image formed on the cornea of the eye real or virtual? Real 5 of 6 What is the name of sound waves that can't be detected by human hearing? Ultrasound 6 of 6
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