The Obedient Ball
★Exhibit Content: Bernoulli's Principle ★Interaction: Electromechanical Interaction ★Operation: Press the "Start" button and observe the movement of the ball in the airflow. ★Exhibit Description: The exhibit consists of a vertical pipe and a connected horizontal U-shaped tube, a very light ball, and a fan. Press the button to start the fan, and you will see the ball moving along the airflow. When it reaches the upper end of the U-shaped tube, it obediently changes its vertical upward direction and enters the horizontal pipe. ★Scientific Principle: Why does the ball obey so obediently? According to Bernoulli's principle: the faster the fluid flow, the lower the pressure; the slower the flow, the higher the pressure. When the fan starts, the vertical upward airflow lifts the ball inside the pipe and moves it upward along the center of the airflow. The vertical airflow creates a negative pressure inside the U-shaped tube, with the lowest pressure at the lower end. When the ball reaches the upper end of the U-shaped tube, under the action of negative pressure, it obediently changes its vertical upward direction, is drawn into the horizontal pipe, and moves toward the lower end.
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- 0.9*0.7*1.3m 0.9*0.7*1.3mDimensions (unit: m): 0.9*0.7*1.3m Brand: KexMall Model: PopsciCat-mechanics-130 1. Materials: ① Base: 2mm cold-rolled steel frame, 2.0mm cold-rolled steel enclosure with two-tone baked paint, rounded without sharp edges ② Tabletop: Kelesi artificial stone, thickness ≥12mm, with flame-retardant board underneath ③ U-shaped pipe: transparent acrylic tube ④ Pipe elbow: transparent PVC ⑤ Maintenance door: 2.0mm cold-rolled steel plate with baked paint surface ⑥ Electrical control box: cold-rolled steel plate with baked paint, containing control circuit, switching power supply, circuit breaker, terminal blocks, etc. 2. Main Configuration: ① Electrical control: electrical logic control system, equipped with Guanjian® K2 special PLC controller with protection for science exhibits ② Button: self-resetting 22mm stainless steel metal button with ring light; LED voltage not higher than 12V ③ Fan: silent fan. ④ Φ3cm lightweight ball, 8MM acrylic ventilation box 3. Installation Requirements: ① Power requirement: AC100-240V, 50/60Hz 200W (standard three-wire socket) ② Installation base: place directly ③ Entry passage: door frame size (width × height) ≧0.8m×1.8m, continuous turning interval ≧1.5m ④ Maintenance access: not required
★Exhibit Content: Bernoulli's Principle ★Interaction: Electromechanical Interaction ★Operation: Press the "Start" button and observe the movement of the ball in the airflow. ★Exhibit Description: The exhibit consists of a vertical pipe and a connected horizontal U-shaped tube, a very light ball, and a fan. Press the button to start the fan, and you will see the ball moving along the airflow. When it reaches the upper end of the U-shaped tube, it obediently changes its vertical upward direction and enters the horizontal pipe. ★Scientific Principle: Why does the ball obey so obediently? According to Bernoulli's principle: the faster the fluid flow, the lower the pressure; the slower the flow, the higher the pressure. When the fan starts, the vertical upward airflow lifts the ball inside the pipe and moves it upward along the center of the airflow. The vertical airflow creates a negative pressure inside the U-shaped tube, with the lowest pressure at the lower end. When the ball reaches the upper end of the U-shaped tube, under the action of negative pressure, it obediently changes its vertical upward direction, is drawn into the horizontal pipe, and moves toward the lower end.
Review
Principle Display: ★★★★★ Interaction Effect: ★★★★ Ease of Installation: ★★★★★ Durability: ★★★★ Overall Rating: ★★★★★