National Physics Experiment Report
First, pour a few holes in the bottom of a beverage bottle, and then put a proper amount of water into the beverage bottle. At this time, water will be found at the bottom of the bottle, which can confirm that the liquid has pressure on the bottom of the container. Continue to fill the bottle with water quickly, then tighten the cap. At this point, no water is observed at the bottom of the bottle. If you loosen the cap again, you will find that the water is flowing out. This shows that this phenomenon is formed by atmospheric pressure.
Second, take another empty beverage bottle filled with water, then tighten the flat cover, then use a alcohol lamp to heat a steel needle. Gently apply a fine hole to the lower side of the bottom of the beverage bottle. When the hole is finished, no water will flow out. At the same height of the first hole, a hole is burned at any position and it is found that no water still flows out. This is due to the effect of atmospheric pressure and demonstrates that atmospheric pressure is present in all directions, in contrast to liquid pressure characteristics. After the hot holes were then applied over the first two holes, the lower holes were found to flow outward, while the upper holes did not flow outward, and air from there entered the top of the beverage bottle. If the bottle cap of the beverage bottle is unscrewed, it will be found that the three holes will flow. And the closer the hole is to the bottom of the bottle, the farther the water column is sprayed.
3. After taking a bottle of water and filling the bottle cap, turn it upside down in a glass sink filled with enough water, unscrew the cap in the water, grab the bottle and lift it up, but do not expose the bottle to the surface. The water in it does not fall back into the sink. On the basis of this experiment, it is also possible to punch holes in the bottom of the bottle and immediately find the water in the bottle flowing back into the water tank. The reason is that the atmospheric pressure inside and outside the bottle cancel each other out, and the water column flows back to the water tank under the action of its own gravity.
Fourth, you can also choose a can, do not pull all the pull, the opening is as small as possible. After pouring the beverage, use a hair dryer to heat the tank for a period of time, then seal the mouth with plasticine to ensure no air leakage. Then use cold water to pour on the can, and then hear the sound of the cans being deformed by pressure, and see that some places on the cans are crushed. It shows that the gas expands and contracts, which also proves the existence of atmospheric pressure.
Second, take another empty beverage bottle filled with water, then tighten the flat cover, then use a alcohol lamp to heat a steel needle. Gently apply a fine hole to the lower side of the bottom of the beverage bottle. When the hole is finished, no water will flow out. At the same height of the first hole, a hole is burned at any position and it is found that no water still flows out. This is due to the effect of atmospheric pressure and demonstrates that atmospheric pressure is present in all directions, in contrast to liquid pressure characteristics. After the hot holes were then applied over the first two holes, the lower holes were found to flow outward, while the upper holes did not flow outward, and air from there entered the top of the beverage bottle. If the bottle cap of the beverage bottle is unscrewed, it will be found that the three holes will flow. And the closer the hole is to the bottom of the bottle, the farther the water column is sprayed.
3. After taking a bottle of water and filling the bottle cap, turn it upside down in a glass sink filled with enough water, unscrew the cap in the water, grab the bottle and lift it up, but do not expose the bottle to the surface. The water in it does not fall back into the sink. On the basis of this experiment, it is also possible to punch holes in the bottom of the bottle and immediately find the water in the bottle flowing back into the water tank. The reason is that the atmospheric pressure inside and outside the bottle cancel each other out, and the water column flows back to the water tank under the action of its own gravity.
Fourth, you can also choose a can, do not pull all the pull, the opening is as small as possible. After pouring the beverage, use a hair dryer to heat the tank for a period of time, then seal the mouth with plasticine to ensure no air leakage. Then use cold water to pour on the can, and then hear the sound of the cans being deformed by pressure, and see that some places on the cans are crushed. It shows that the gas expands and contracts, which also proves the existence of atmospheric pressure.
Physical Experiment Report·Chemical Experiment Report·Biological Experiment Report·Experiment Report Format·Experiment Report Template
recommended article
- Research and implementation of the subject of "interest composition teaching method"
- Biological Experiment Report "Comparing Catalase and
- “Legal Clinic Education in Multimedia Situations”
- Chemical experiment report "density = mass divided by body
- University physics experiment report
- Exploring the candle experiment report
- Middle school physics experiment report
- National Primary and Middle School Composition Series Training Experiment Report
- Beijiao Town Center National Small Language Cooperative Learning Experiment
- E-commerce experiment report
- Middle school chemistry experiment report
- National Nature Experiment Report
popular articles
- University physics experiment report
- Thinking sentence
- Father's love
- Physical Experiment Report "Using Spectrometers and Transmitted Lights
- Physical experiment report
- Classic talk mood phrase
- Ideal famous saying
- Life perception phrase
- Valentine's sentence
- Classical life motto
- Life perception phrase
- Web page production experiment report
- High school chemistry experiment report
- Describe the sentence of the river
- Praying the mother's famous words
- Thanksgiving teacher's sentence
- Thanks for the words 2019
- University Physics Demonstration Report
- If you swear, the more poisonous, the better, without the dirty words.
- Valentine's Day confession
- Physical experiment report "Specification of spectrometer and three
- Happy famous words
- Organic Chemistry Experiment Report
- experimental report
- Physical Experiment Report "Determination of Triangular Refractive Index
- Learning endless famous words
- Encourage your child’s words
- Describe bad sentences
- Praise the teacher's maxim
- a famous saying that protects the environment