Tuesday, 17 June 2014 13:24

## F2-26: BUOYANCY PARADOX - BALL IN TWO LIQUIDS

• ID Code: F2-26
• Purpose: Demonstrate buoyancy with a counterintuitive element.
• Description: A ball floats in a beaker of water (at left in picture above). The ball sinks in a beaker of mineral spirit paint thinner (at right above). The mineral spirit paint thinner is immiscible with water, and will float above the water when poured slowly on top of water. The ball then floats at a higher level because the mineral spirits in which the upper part of the ball is floating provide an additional buoyant force on the ball. If the ball is floating on water alone, the top part of the ball is immersed in air, which has a much smaller density.
• Availability: Available
• Loc codes: F2
Read 1142 times Last modified on Tuesday, 24 October 2017 10:25
• #### F2-01 ARCHIMEDES' PRINCIPLE

Demonstrates the buoyant force on a body submerged in a fluid to be equal to the weight of the displaced Read More
• #### F2-02: CARTESIAN DIVER

Demonstrate a variety of fluid mechanics phenomena, including the compressibility of a gas, the incompressibility of water, Boyle's law, Pascal's Read More
• #### F2-03: CARTESIAN DIVER - EXPLICIT VERSION

Demonstrate explicitly how a Cartesian diver works by showing how the water enters the diver when the pressure in the Read More
• #### F2-04: BUOYANCY - SPHERE AND WATER

Challenge the students' thinking about the buoyant force by considering the question: "Will a round object, without a flat top Read More
• #### F2-05 BUOYANCY - BOAT AND ROCK

Illustrates buoyancy Read More
• #### F2-06: BUOYANCY - SINKING BOAT

Illustrates buoyancy Read More
• #### F2-07: BUOYANCY - PEPSI AND DIET PEPSI

Show the difference in density between soft drinks with and without sugar. Read More
• #### F2-08: BUOYANCY - BATTLESHIP IN BATHTUB

Illustrate Archimedes' Law in a counterintuitive manner. Read More
• #### F2-10: BUOYANT BUBBLES

Demonstrate buoyancy and diffusion in an interesting way. Read More
• #### F2-11: HYDROMETER

Measure the density of a liquid. Read More
• #### F2-12: HOT AIR BALLOON

Show that hot air is less dense than cold air by operating a hot air balloon. Read More
• #### F2-13: BOUYANCY - EXPANDING BALLOON CONUNDRUM

Conundrum involving weight of an expanding balloon. Read More
• #### F2-21 REACTION TO BUOYANT FORCE

Demonstrates the reaction force using a liquid. Read More
• #### F2-22: BUOYANCY PARADOX - ACCELERATED FRAME

Illustrate dramatically the concept of buoyancy. Read More
• #### F2-23: BUOYANCY PARADOX - INVERTED BLOCK

Illustrate buoyancy in a paradoxical way. Read More
• #### F2-24: ACCELERATED BUOYANT BALL

Illustrate buoyancy in a paradoxical way. Read More
• #### F2-25: BALANCE PARADOX - BUOYANCY WITH CROSSOVER

Present buoyancy in a paradoxical way. Read More
• #### F2-26: BUOYANCY PARADOX - BALL IN TWO LIQUIDS

Demonstrate buoyancy with a counterintuitive element. Read More

• #### F2-31: BUOYANT BALLS IN BEANS

Illustrate buoyancy in a surprising way. Read More
• #### F2-32: FLOATING SQUARE BAR

Illustrate buoyancy and the orientation in which a long square bar floats in a very dramatic way. Read More
• #### F2-41: DENSITY - SLOPE OF MASS VS VOLUME GRAPH

Determine the density of water. Read More
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