Life application of atmospheric pressure, life using atmospheric pressure examples and explanations

Straws, syringes, cuppers, vacuum cleaners, liquefied petroleum.

The barometer is an instrument used to measure atmospheric pressure, based on Torricelli's experimental principle. The types of barometers include mercury barometers and aneroid barometers. Its uses are:

It can be changed in the weather, and the weather is sunny when the air pressure is high; When the air pressure drops, there will be wind and rain weather. Measurable height. For every 12 meters of elevation, the mercury column is lowered by about 1 millimeter, so the height of the mountain and the altitude of the aircraft as it flies through the air can be measured.

Pumping machine pumping machine aka name. Water pump.. It is a hydraulic machine that uses atmospheric pressure to lift water from a low place to a high place.

It consists of a water pump, power machinery and a transmission device. There are many types to suit different needs. Commonly used are:

Piston pumping. And. Centrifugal water pump.

The structure of the piston pumping machine is simple, easy to operate, but the water output is small, and in the actual case of energy loss, the height of the water can only reach about eight meters, and the efficiency is also low. Centrifugal water pump is a kind of pumping machinery that uses the centrifugal movement of water, its water output is large, the water lifting height is high, and it is widely used in farmland irrigation, drainage and water supply and drainage of industrial and mining enterprises and towns.

Extractor Air extractor is a type of machine used to pump out the gas in a closed container. Generally, there are two types: hand-cranked and electric, and the main structure is similar to that of a pump. It works similarly to a water pump, except that the substance being pumped out is air.

The pump is a common tool made by using the relationship between gas pressure and volume. There is a piston in the pump, and there is a concave rubber disc on it, when the piston is pulled up, the volume of air under the piston increases, the pressure decreases, and the air above the piston is squeezed from the rubber disc to the bottom; When the piston is pressed down, the volume of air under the piston decreases and the pressure increases, so that the rubber disc is pressed against the cylinder wall to prevent air from leaking above the piston; Continue to press down on the piston, and when the air pressure is strong enough to open the rubber sleeve on the tire valve (the valve is a one-way valve), the compressed air enters the tire.

Pump is often used.

Pressure cooker pressure cooker is made by increasing the air pressure in the pot and increasing the boiling point of water. When using a pressure cooker to cook rice, inside the lid of the pressure cooker is an airtight container. When heating, the temperature of the water in the pot continues to rise, and the evaporation of the water is also accelerating, because the pot is sealed, there is more and more water vapor above the water surface, and the air pressure in the pot is getting bigger and bigger, until the air pressure valve is jacked up to run the gas, and the air pressure in the pot does not increase.

At this time, the air pressure in the pot is generally close to one atmosphere. Under such air pressure, the boiling point of water is close to 120, and the process of food from raw to cooked is a heating process, the higher the temperature, the faster it will be cooked, so the pressure cooker will naturally cook the rice easily.

Straws, pens, pressure cookers, siphon phenomena, Magdeburg hemispheres, air pumps, water pumps, fountains, oil blowouts, blowing bubbles, daily breathing.

Let's take a look at an interesting experiment with atmospheric pressure.

(1) Examples of the use of atmospheric pressure in life can be cited: suction cups, fountain pens to absorb ink, straws to suck drinks, pumping machines to pump water, vacuum cleaners, injection infusions, vacuum compression packaging bags, etc

2) Take advantage of beneficial inertia, such as: running during the long jump, slapping the dust on the clothes, loosening the hammer head, and hitting the hammer handle on the ground a few times;

Prevent harmful inertia, e.g. sit firmly when riding the bus, and fasten seat belts for car drivers and front passengers

3) If there is no friction in our life, such as the ground is very smooth, then we will fall down when we walk, and the car will not be able to stop after braking; For example, the blackboard is very smooth, and you can't write on it

Answer: (1) The use of atmospheric pressure in daily life is such as the tap pen to absorb ink and the straw to suck drinks

2) Use inertia: run and pat the dust on your clothes during the long jump; Prevent inertia: When taking the bus, sit firmly, and the car driver and front passengers should fasten their seat belts

3) If there is no friction in our life, these phenomena will occur: people cannot walk normally, and the car cannot stop after braking

<>1. Barometer, made according to the experimental principle of Torricari, is used to measure atmospheric pressure, and the types of barometer include mercury barometer and aneroid barometer.

2. The pumping machine is a hydraulic machinery that uses atmospheric pressure to lift water from low to high places, which is composed of a water pump, power machinery and transmission device.

3. Extractor, one of the air extractors, is a machine used to pump out the gas in a closed container.

4. The pump is a common tool made of the relationship between gas pressure and volume.

5. Pressure cooker, pressure cooker is made by increasing the air pressure in the pot and increasing the boiling point of water.

Problem solving ideas: (1) There are many life examples of atmospheric pressure, such as straw drinking drinks, pumping water from pumps, etc

2) the phenomenon of inertia is universal in life, but some are beneficial and we can make the most of it; Some are harmful, try to prevent it

3) Friction is ubiquitous in life, such as friction between the sole of the shoe and the ground when walking, and friction between the ground when the car is buried in front of you

(1) Examples of the use of atmospheric pressure in life can be cited: suction cups, fountain pens to absorb ink, straws to suck drinks, pumping machines to pump water, vacuum cleaners, injection infusions, vacuum compression packaging bags, etc

2) Take advantage of beneficial inertia, such as: running during the long jump, slapping the dust on the clothes, loosening the hammer head, and hitting the hammer handle on the ground a few times;

Prevent harmful inertia, e.g. sit firmly when riding the bus, and fasten seat belts for car drivers and front passengers

3) If there is no friction in our life, such as the ground is very smooth, then we will fall down when we walk, and the car will not be able to stop after braking; For example, the blackboard is very smooth, and you can't write on it

Answer: (1) The use of atmospheric pressure in daily life is such as the tap pen to absorb ink and the straw to suck drinks

2) Use inertia: run and pat the dust on your clothes during the long jump; Prevent inertia: When taking the bus, sit firmly, and the car driver and front passengers should fasten their seat belts

3) If there is no friction in our life, these phenomena will occur: people cannot walk normally, and the car cannot stop after braking

Comments: The test point of this question is dry: the comprehensive application of atmospheric pressure; Types of friction

Test Center Comments: This question closely combines the physics knowledge we have learned with the phenomena of daily life, and is a relatively open-ended test question, so that students can fully demonstrate what they have learned, which is also a popular question type in recent years

Vacuum cleaner vacuuming.

Vacuum compression bags store items.

Range hood exhaust smoke.

The suction cup hook attaches to the wall.

By the way, the lift-off of a hydrogen balloon belongs to buoyancy.

1.Vacuum cleaner vacuum2Vacuum compression packaging bags to store items 3Range hood exhaust smoke 4The hook attaches to the wall.

Pressure cooker can be related to suction cups! Like hooks and stuff like that. As long as there are suction cups

Pressurized water wells are mechanical.

The hydrogen balloon principle belongs to the category of atmospheric pressure.

Cupping straw and dripping.

Water guns, pumps, siphons, cooking, pumping machines, ......