Description

Product name: Submarine sink and float demonstrator

Size: transparent sphere diameter 70mm/2.75 in

Material: plastic, metal fittings

Weight: a set of about 152g

Instructions
1. Bring your own transparent water tank or beaker (about 10cm in diameter and 15cm in height) to pour 3/4 volume of clean water into the transparent water tank.
2. Push and pull the piston several times in the water in the suction and exhaust cylinder to make the piston and cylinder wall lubricate and seal, and push the piston to 10 ml near the top.
3. Weigh the submarine’s own weight with a strip box dynamometer and make a record.
4. Connect the suction and exhaust tube with the suction and exhaust holes of the submarine’s air chamber with a transparent plastic tube, and then gently put the submarine into the water. At this time, the submarine floats on the water.
5. Slowly pull the piston of the suction and exhaust cylinder outwards, the air chamber of the submarine is exhausted, and the water is sucked in from the water inlet at the bottom. At this time, the submarine sinks slowly as its weight increases.
6. Weigh the submarine with a dynamometer and record the weight of the sphere.
7. Push the piston inward again, the air chamber inhales, the drain hole drains, the weight of the submarine gradually decreases and floats slowly, and then the weight of the diving ball is weighed with a dynamometer, which is just the weight of the ball itself.