1011 past contests
Topic 45 · Mirror formula: finding focal length, object distance or image distance
Topic 34 · Linear momentum and impulse in a collision with a wall
Topic 42 · Inductive reactance of a single inductor
Topic 10 · Identifying the correct heat-capacity formula: true/false
Topic 33 · Heat capacity and specific heat: q = c x delta-t
Topic 61 · Angular frequency of a mass-spring oscillator: omega = sqrt(k/m)
Topic 6 · Physical quantity riddles: wave properties
Topic 46 · Optical power of a lens: true/false
Topic 36 · Forces on an object sliding down a smooth inclined plane: true/false
Topic 55 · Physical property riddle: semiconductors
Topic 5 · Equivalent capacitance of two capacitors connected in series
Topic 38 · Newton's second law with vector force and acceleration components
Topic 2 · Variation of weight with location on earth: poles, altitude and free fall (true/false)
Topic 3 · Kinetic and potential energy: general concepts (true/false)
Topic 3 · Gravitational potential energy at different depths below a reference point
Topic 41 · Magnetic flux versus magnetic flux density: comparison