Topic · 10 games
Rubbing, touching, and charged plates move electrons around, but never make or destroy charge. Charge always comes in whole electrons: Q = n·e, with e = 1.602 × 10⁻¹⁹ C.
PLAY NOW · 92
Rubbing doesn't make charge; it moves electrons: Q = −n·e on one side, +n·e on the other. Charge a balloon, see what the wool keeps, count electrons, and make an ion.
PLAY NOW · 93
A charged drop hovers when the electric force balances its weight: q·V ÷ d = m·g. Measure charges, count electrons, set the voltage, and find e from three drops.
PLAY NOW · 94
Charge flows through metal until both spheres are at the same potential, and not at all through plastic. Share charge between equal spheres, pass it along a row, test a plastic ball, and join a big and a small sphere.
PLAY NOW · 95
A material's resistivity decides whether it conducts: R = ρ·L ÷ A, I = V ÷ R. Copper and glass are twenty powers of ten apart. Test five samples on a 12 V bench.
PLAY NOW · 96
Like charges push apart with F = k·q₁·q₂ ÷ r², harder the closer they are. A bead floats where that push equals its weight. Find the gap, the charge, the mass, and the floor's push.
PLAY NOW · 97
Charges push or pull with F = k·q₁·q₂ ÷ r², equal and opposite, and forces from several charges add. Measure a pull, find a balance point, add two forces, find a charge, and double everything.
PLAY NOW · 98
The electric field is the force on a test charge divided by its charge, E = F ÷ q, and a point charge makes E = k·Q ÷ r². Find a field from a force, size a probe's force, add two fields, and find a distance.
PLAY NOW · 99
Between two charged plates the field is uniform, E = V ÷ d, and a charge feels a steady push across the beam, so its path bends into a parabola. Find the field, the acceleration, the bend, the voltage for a target, and a proton's bend.
PLAY NOW · 100
Electric potential is energy per charge: a point charge makes V = k·Q ÷ r, potentials add as plain numbers, and carrying a charge q takes work W = q·ΔV. Read a potential, climb, walk a contour, add two charges, and find a ring.
PLAY NOW · 101
A charge that falls through a potential difference ΔV gains kinetic energy q·ΔV = ½·m·v². Find an electron's energy and speed, a proton's speed, an alpha particle's energy in eV, and the voltage that stops an electron.
11 games
Position, velocity, acceleration, and gravity.
2 games
Units, SI prefixes, and scientific notation.
3 games
Rearranging formulas: inverse operations and unit checks.
3 games
Vector addition, displacement, and forces.
3 games
Right triangles, inverse functions, and the unit circle.
3 games
Horizontal and angled launches: two motions at once.
3 games
Uniform circular motion, angular velocity, and centripetal force.
3 games
Newton's law of universal gravitation, weight, orbits, and Kepler's laws.
3 games
Force equilibrium, cable tension, torque, and support reactions.
5 games
Torque, lever arms, tipping, and angular acceleration.
3 games
Centre of mass, balance points, composite objects, and toppling.
9 games
Density, buoyancy, floating, and pressure under water and in the air.
3 games
Flow, Bernoulli's principle, jets, pipes, and lift.
10 games
Amplitude, period, frequency, pendulums, springs, energy, and resonance.
27 games
What a wave is, amplitude, wavelength, frequency, period, and sound.
16 games
Voltage, current, resistance, and the energy circuits carry.