Paper 3

Section A
1) Water wave interference, ripple tank
2) Lens, 1/u + 1/v = 1/f

Section B
3) Relationship between the pressure and depth
4) Diameter of the wire affecting resistance

Hypothesis : For a fixed length of a conducting wire; the thicker the wire, the smaller the resistance
Manipulated variable : Thickness of wire
Responding variable : Resistance
Constant variable : Type of wire

Good luck