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Spouting Cylinder: Torricelli's Theorem

Item #91-2017

$35.00 Bundle Discount

Unit Price	$35.00
6+	$32.60

Visualize fluid pressure and energy conservation

Investigate two core fluid dynamics ideas with one clear, classroom-ready apparatus. The Spouting Cylinder lets students explore Torricelli’s theorem qualitatively while also connecting observations to Bernoulli’s equation and conservation of energy. As water exits from three evenly spaced nozzles at different heights, students see how pressure depends on depth—and how fluids obey the same energy laws as moving objects.

Standing 49 cm tall and made of clear acrylic, the cylinder is easy to see from across the room. Run all three spouts at once for dramatic comparisons, or use the included stoppers to isolate individual flows. A filler hose barb makes it easy to refill and maintain a constant water level for repeatable results.

Why Teachers Love the Spouting Cylinder

Two concepts, one demo: Explore Torricelli’s theorem and Bernoulli’s equation together using a single, intuitive setup.
Highly visual and engaging: Clear acrylic and visible water jets make abstract fluid ideas tangible.
Flexible investigations: Use all three nozzles simultaneously or isolate each height with included stoppers.
Designed for clean comparisons: Evenly spaced spouts and constant water depth support clear, repeatable observations.

Resources

Torricelli's Theorem Lab Activity

What You Can Teach with the Spouting Cylinder

Ideal for high school physics, AP Physics, IB, and introductory college courses:

Torricelli’s theorem: Relate exit speed of a fluid to the height of fluid above the opening.
Bernoulli’s equation: Show that total mechanical energy per unit volume remains constant along a streamline (neglecting losses).
Fluid pressure vs. depth: Observe how deeper openings experience greater pressure and higher exit speeds.
Conservation of energy in fluids: Connect gravitational potential energy to kinetic energy of flowing water.
Qualitative & empirical reasoning: Compare stream distances to test predictions and explain results using energy principles.

When the water level is held constant, students observe that streams from different heights travel consistent distances—powerful evidence that Bernoulli’s principle is at work.

The Spouting Cylinder transforms fluid dynamics from equations on the board into something students can see, test, and explain—making Torricelli’s theorem and Bernoulli’s equation click together in a single, memorable investigation.