MIT Kraków https://validator.w3.org/feed/docs/rss2.html Scientific gym Races Block and tackles Hamster wheel Lateral force Reaction time Sprocket wheel First-order lever Sandy Planet Blocks Sand sculptures Draw on sand Excavator Lissajous Figures Sinusoid Supercool playground Seesaw Double swing Single swing Rocket Acoustics Beats Tubular bells Triangles The doppler effect Sound speed Wind gongs Tam-tam gong Xylophone Pipe organs Humming pipes Stone cimbalom Purring stone Acoustic telegraph Keyboard aerophone Focusing of sound Hydrostatics Water in a rotating cylinder Water in a spinning sphere Joule’s experiment Hydraulic scale Water vortex The Bermuda triangle Cartesian diver Magnetism Magnetic pendulum Hourglass Chaotic pendulum Magnet races Muzeum Inżynierii i Techniki