Blow and It Gets Closer
Operation: 1. Press the start button; 2. Turn the handwheel and observe the ball attraction phenomenon. Function Overview: This exhibit includes a fan, a rotating handwheel, balls, and a display stand. The exhibit consists of one fan and two balls with adjustable positions. Visitors adjust the distance between the two balls in the airflow by turning the handwheel. When a certain position is reached, the balls will attract each other. Scientific Principle: Bernoulli's theorem was discovered in 1738 by Daniel Bernoulli, known as the "father of fluid mechanics." According to Bernoulli's theorem, the faster the fluid flow, the lower the pressure; conversely, the higher the pressure. When air is blown vertically between the two balls, the air velocity in the middle increases, causing lower pressure there, while the pressure on the outer sides of the balls is higher, pushing them toward the middle. Therefore, the balls move toward each other. Bernoulli's theorem has a wide range of applications in hydraulics and applied fluid mechanics. Airplane takeoff and the "banana" kick in football are both applications of Bernoulli's theorem.
Options
- 0.9×0.6×1.20 0.9×0.6×1.20Overall Dimensions: 0.9×0.6×1.20 Brand: KexMall Model: PopsciCat-Medium-073 Materials: ① Display stand: 2.0mm cold-rolled steel plate, dimensions not less than 0.75×0.45×0.7m, surface baked paint (or electrostatic powder coating), reserved foot openings for later height adjustment and four-corner balance, reserved AC female socket position for power supply to electrical exhibits ② Tabletop: high-quality flame-retardant fiberglass reinforced plastic, total thickness with edge ≧100mm ③ Instruction plate: acrylic UV high-precision printing, thickness ≧3mm ④ Maintenance door: 2.0mm cold-rolled steel plate, surface baked paint (or electrostatic powder coating) Main Configuration: ① Electrical control: electrical logic control system, equipped with Guandian® K1 type PLC controller with protection specially for science exhibits ② Switching power supply: AC-DC S-60-12/24, input AC100-240V, 50/60Hz, output power 60W ③ Button: self-resetting 22mm stainless steel metal button with ring light; LED voltage not higher than 12V to avoid high-voltage leakage risk; mechanical life: 1 million times; protection level: IP67; protection method: waterproof. Power Requirements: AC100-240V, 50/60Hz 200W (standard three-wire socket)
Operation: 1. Press the start button; 2. Turn the handwheel and observe the ball attraction phenomenon. Function Overview: This exhibit includes a fan, a rotating handwheel, balls, and a display stand. The exhibit consists of one fan and two balls with adjustable positions. Visitors adjust the distance between the two balls in the airflow by turning the handwheel. When a certain position is reached, the balls will attract each other. Scientific Principle: Bernoulli's theorem was discovered in 1738 by Daniel Bernoulli, known as the "father of fluid mechanics." According to Bernoulli's theorem, the faster the fluid flow, the lower the pressure; conversely, the higher the pressure. When air is blown vertically between the two balls, the air velocity in the middle increases, causing lower pressure there, while the pressure on the outer sides of the balls is higher, pushing them toward the middle. Therefore, the balls move toward each other. Bernoulli's theorem has a wide range of applications in hydraulics and applied fluid mechanics. Airplane takeoff and the "banana" kick in football are both applications of Bernoulli's theorem.