https://physlab-wiki.com/ 2026-04-18T19:01:32+00:00 https://physlab-wiki.com/ https://physlab-wiki.com/lib/tpl/UChicago/images/favicon.ico text/html 2021-11-05T18:09:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/bernoulli_ping-pong_ball?rev=1636150170&do=diff Bernoulli Ping-Pong Ball A styrofoam ball or ping-pong ball is kept aloft in stable equilibrium by an upward flow of air. A more dramatic version of this demonstration uses a leaf blower with a much larger ball. L top, K PIRA DCS 2C20.30 text/html 2021-11-05T18:10:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/blow_over_sheet_of_paper?rev=1636150207&do=diff Blow Over Sheet of Paper Bernoulli's principle is demonstrated by blowing air over sheets of paper. oversized paper B4 PIRA DCS 2C20.51 text/html 2022-12-09T15:10:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/fire-vortex?rev=1670616657&do=diff Fire Vortex A fire vortex is generated when a flame enclosed in a metal mesh is rotated. Rotation is attained by placing the setup on a rotating platform. The mesh serves to provide a circulating air current due to shear forces on its surface. This current then causes the flame to rotate; convection in this rotating air current then causes the flame to rise. One can demonstrate that this vortex is due to the rotating air current and not only convection by rotating the flame without the mesh aro… text/html 2022-12-09T15:14:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/magnus-force?rev=1670616854&do=diff Magnus Force The magnus force on rotating body is demonstrated by launching two solo cups attached by their bottoms using an elastic band. This will cause the cups to be projected with some rotation along their vertical axis. This rotation will in turn generate a magnus force on them that will softly propel them forward. text/html 2022-12-09T13:05:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/sinking-boat?rev=1670609106&do=diff Sinking Boat This demo serves to show the dependence of the buoyant force on the floating medium's density for a given mass. It consists of a boat of a mass and volume such that the edge of the boat is barely touching the surface of the water when it's floating text/html 2022-12-09T14:59:02+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/smoke_rings?rev=1670615942&do=diff Smoke Rings A large plastic garbage can with a hole cut in the bottom and a rubber membrane covering its mouth is filled with vapor from a fog machine. When the rubber membrane is hit large smoke rings are produced which travel the length of the lecture hall with little dissipation. text/html 2022-03-08T15:16:33+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/un-mixing?rev=1646770593&do=diff Un-mixing The “un-mixing” apparatus consists of a large, transparent cylinder and a smaller, coaxial cylinder that can be rotated inside. The space between the two cylinders is filled with glycerine. A visible pattern is made in the glycerine using a syringe to inject an ink made of glycerine and graphite. When the inner cylinder is rotated, the ink appears to mix with the rest of the glycerine. However, when the cylinder is rotated in the opposite direction the pattern is re-formed. text/html 2022-12-09T15:02:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/venturi-tube?rev=1670616144&do=diff Venturi Tubes Several Venturi tubes are available to demonstrate the relationship between pressure and flow velocity. Location: text/html 2021-11-05T18:11:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://physlab-wiki.com/physicsdemos/thermodynamics_and_fluid_dynamics/fluid_dynamics/walking_on_water_and_cornstarch?rev=1636150301&do=diff Walking on Water and Cornstarch A tub is filled with a mixture of water and cornstarch, a non-Newtonian fluid. If done quickly enough, one may walk on it. J0 tub PIRA DCS 2C60.30