1011 past contests
Topic 53 · Speed of an object released from rest after falling a given height
Topic 10 · Applying boyle's law, charles's law and the combined gas law to find an unknown gas variable
Topic 33 · Heat capacity of an ideal gas at constant volume vs constant pressure (true/false)
Topic 4 · Mechanical equilibrium of a particle: true/false
Topic 12 · Mass of an object from its density and volume
Topic 48 · Absolute refractive index from the speed of light in a medium
Topic 3 · Gravitational potential energy scaling with height, and a kinetic energy riddle
Topic 3 · Finding the speed of an object from its kinetic energy
Topic 44 · Equivalent inductance of two inductors connected in parallel
Topic 3 · Riddle: kinetic energy, conserved for a free particle
Topic 50 · Problem of the day: projectile launched at an angle - g, velocity components, apex speed, range and pe
Topic 20 · Distinguishing isotopes from isotones by atomic number, mass number and decay mode (true/false)
Topic 29 · Kinetic theory: effect of raising temperature on molecular speed, ke and wall collisions (true/false)
Topic 38 · Square of the resultant of two forces at an angle, using the cosine rule
Topic 50 · Range of a projectile launched from the ground
Topic 33 · Heat capacity and specific heat: q = c x delta-t
Topic 7 · Resistance of a wire from resistivity, length and cross-sectional area
Topic 9 · Wavelength of light from its frequency