Buoyant Effect Demonstration (Educational equipment)

• Condition: New
• Customized: Customized
• Transport Package: Carton
• Specification: As shown in the figure
• Trademark: Shunma / OEM
• Origin: China
• Model NO.: 21012
• HS Code: 9023009000
• Production Capacity: 50, 000PCS/ Month

Product Description

Product Description

Buoyant Effect Demonstration ( Educational equipment )

Product Introduction
The instrument is composed of double water tank, float, connecting pipe, exhaust pipe, connector, etc. The double-layer water tank is made of transparent plastic, and the float is made of colored plastic. It is beautiful, generous, transparent, and has great visibility. The float is also equipped with an adjusting screw for fine tuning the volume of the float.

Product Specification

Product name	Buoyant principle demonstrator
Material	Plastic
Structure	It is composed of double-layer water tank, float, connecting pipe, exhaust pipe, connector, etc

Instructions
1. Buoyancy experiment
(1) Put an appropriate amount of zinc particles (self prepared) (or other metal materials, the same below) into the float to make the amount greater than the weight of the water that can be drained.
(2) Use a spring scale to measure the weight G of the float in air.
(3) Immerse the float in water, and then read the reading G 'displayed by the spring scale.
(4) The float is subjected to upward buoyancy F.
F=G-G'

2. Cause of buoyancy
(1) Hang the exhaust pipe on the outer wall of the water tank, close the connecting pipe with a small valve, and place the float on the water tank and align it.
(2) Add water to the large water tank until the liquid level exceeds the top of the float. Since the float is tightly connected with the small water tank without water leakage, the lower surface of the float is not subject to upward pressure of the liquid, so it cannot float out of the liquid surface.
(3) Hook the float with a spring scale and lift it up. When the pull slightly exceeds the weight of the float, it still cannot be lifted, indicating that the float is pulled downward from the top.
(4) Open the small valve, the water in the large water tank enters the small water tank through the connecting pipe, and the air in the small water tank is discharged through the exhaust pipe. When the liquid fills the small water tank, the water contacts the bottom of the float, generating upward buoyancy, and the float floats out of the water. The above phenomenon shows that the difference between the upward and downward pull of the liquid on the object is the buoyancy of the liquid on the object.
(5) Close the connecting pipe with a small valve and press the float to the top of the small water tank. Lower the upper end of the exhaust pipe filled with water below the bottom of the float, release the float, and the float will not surface. Measure the height difference h2 between the liquid level of the large water tank and the top of the float, gradually raise the exhaust pipe until the float is about to float. Measure the height difference h1 between the exhaust pipe orifice and the bottom of the float, and we can get: pgh1s-pgh2s=G
Where: p: density of water, g: 9.8 N/kg, s: sectional area of float, G: weight of float
The above phenomenon shows that the bottom of the float must not only contact with the water, but also make the upward pressure reach a certain size before the float can be lifted out of the water.

3. Archimedes law
(1) Put an appropriate amount of zinc particles into the float, and measure the weight G of the float with a spring scale.
(2) Put a part of the float into the liquid, record the depth d into the liquid and the reading G 'of the spring scale. It can be obtained that the buoyancy F=G-G'=p.Sd.g, that is, the buoyancy is equal to the gravity that the float receives when it discharges the liquid.
(3) The above conclusions can be verified repeatedly by changing the depth of the float immersed in the liquid and repeating the above experiments.

4. Conditions for objects floating on the liquid surface
(1) Measure the weight G of the float with a spring scale.
(2) Float the float on the liquid surface and record the depth d of the float immersed in the liquid to obtain the buoyancy F of the float.
F=p.sd.g
Comparing the sizes of G and F, we can find that F=G. That is, the condition that the object floats on the liquid surface is that the buoyancy is equal to the gravity of the object.
(3) Put appropriate zinc particles into the float to keep it floating on the liquid surface. Repeat the above experiments to verify the above conclusions repeatedly.

5. Levitation experiment
1.Put appropriate zinc particles into the float, and then weigh them carefully with a balance, so that the weight of the floating body is exactly equal to the weight of the water in the same body.
2.Place the adjusting screw on the float cover in the middle position.
3.Immerse the float in the water, at this time, the float generally cannot suspend. If the float floats up, it indicates that the buoyancy is slightly greater than the gravity, then the adjusting screw should be slowly rotated inward to reduce the volume of the float, so as to reduce the buoyancy until the suspension is successful. On the contrary, if the float sinks, it indicates that the buoyancy is slightly less than gravity, then the adjusting screw should be slowly rotated outward to increase the buoyancy volume, so as to increase the buoyancy until the suspension is successful. This experiment should be repeated carefully with less adjustment each time to reduce the time of the experiment.

Product feature and application
It is used to demonstrate the buoyancy experiment, the principle of buoyancy generation, Archimedes' law, the condition of physical floating on the liquid surface and the levitation experiment in the physics teaching of middle schools.

Maintenance and precautions
1. It shall be handled with care during use and shall not collide with each other to ensure its transparency and sealing.
2. When demonstrating the cause of buoyancy, if it is necessary to repeat the operation, the water in the exhaust pipe must be drained first to avoid poor exhaust, which will cause the float to float out of the liquid surface in advance.
3. When putting zinc particles into the float, open the upper cover of the float for installation, and do not put them into the hole where the adjusting screw is located to avoid damaging the thread.
4. After the experiment, the instrument shall be dried and stored to avoid contact with any organic solvent.

Detailed Photos