Energy from the sun shining on the earth
Benefits: It can promote photosynthesis in plants and produce enough food to feed humans.
Disadvantages: With the appearance of the ozone hole, too much ultraviolet rays hit the earth.
In addition to the above advantages, there are many others.
1. The reserves can be considered inexhaustible (around five billion years) and will not produce waste gases to pollute the environment. They therefore attracted more and more attention. For example, some companies are currently developing solar-powered cars, hoping to replace existing cars. and solar calculators and solar watches that have been around for a long time. Additionally, some companies have successfully developed solar water heaters. These water heaters not only save electricity and gas, but alsois also water, and has many advantages.
2. Sunlight on our skin will dilate subcutaneous blood vessels, increase blood flow, increase the excretion and resistance of toxic substances, increase the secretion of saliva and gastric juice, and strengthen gastrointestinal motility. .
3. The skin can also produce vitamin D from certain chemicals, such as ergot, cholesterol, etc., under sunlight. These vitamins, calcium and phosphorus, are important components of our bones. Without them, we will suffer from rickets.
4. Sunshine is even more important for children, as they grow and develop quickly, and bone development plays an important role in supporting the entire body in times of lack of sunlight. to form vitamin D, there are bound to be serious problems with the child's development.
5. In winter, womenGirdles enjoy many benefits from sunbathing. Indeed, during pregnancy, women's body metabolism accelerates and their demand for various nutrients also increases, particularly calcium. As we all know, vitamin D can promote the body's absorption of calcium. If a pregnant woman lacks vitamin D in her diet or does not absorb enough food and does not get sunlight often, the 17-dehydrocholesterol in the skin cannot produce vitamin D due to ultraviolet rays. , the intestinal wall will have difficulty absorbing calcium. If you suffer from a prolonged deficiency of vitamin D, calcium, phosphorus and other substances, pregnant women are prone to osteomalacia. This disease is caused by a lack of nutrients due to the body's high metabolism. It is a very serious complication in pregnant women.
6. For working minorsHaving been underground for a long time, sunbathing can help them recover and maintain their health, so sunbathing has become a fashion.
7. Energy on earth depends directly or indirectly on the supply of sunlight. Green plants can convert solar energy into chemical energy, and plants can be eaten by animals, and herbivores are therefore eaten by carnivores. , based on nutritional relationships, connect various organisms in the environment to form a food chain.
8. The sun's ultraviolet rays have a strong sterilizing capacity. Generally, bacteria and some viruses will be killed if exposed to sunlight for half an hour or several hours.
9. Bring light.
Disadvantages:
1. Although the energy of solar radiation is enormous, because it is widely distributed on the Earth's surface, the energy densitythat solar energy is relatively weak. Collecting solar energy over a large area requires a large area of equipment and a significant investment.
2. Due to the Earth's white rotation, solar energy is intermittent. This means that for the same location, the solar energy received is intermittent. This determines: either solar energy can only be used as auxiliary energy, or energy storage devices must be added. It is therefore also necessary to increase investments. At the same time, large-scale energy storage is technically difficult.
3. The weather being sunny, cloudy and rainy increases the intermittent nature of solar energy and makes solar energy random.
4. Because the earth is round and because of the motion characteristics of the earth itself, the distribution of solar energy on the earth is very uneven.
Dueof the above four defects, especially the first and second defects, this brings great difficulties to the development and utilization of solar energy. This is the fundamental reason why the proportion of development and use of solar energy is very low today.
First, we need to be clear about the Earth Only part of the Earth's temperature comes from the sun, and most of it is provided by underground heat sources . Additionally, the earth has an atmosphere that resembles that which people carry. Just like thick clothing, you will be warm when you are in the sun and your body will not feel cold when you are not in the sun.
Why do mountains have lower temperatures when they are closer to the sun? The Earth's surface absorbs electrical waves from the sun and generates heat at high altitudes. Why do theyTemperatures at high altitudes are lower. than those at low altitude? What is the explanation?
Didn’t the sunlight that shines on us today reach Earth a hundred years ago or more? Are you or do you want to be when the sun has gone out and no longer shines? The sunlight that shines on us today was only transmitted to the earth a hundred years ago or more! Want to be there after the sun has gone out and no longer shines?
The temperature generated by sunlight irradiating the air will dissipate quickly with the airflow. The reason why the temperature on the earth's surface is higher is that the heat generated by sunlight excites materials which disperse as air masses on the earth's surface. This is also the reason why temperature decreases as altitude increases. Temperature measuring points have valuesdifferent on the surface and in the air with strong convection.
But just like when you shine a flashlight into the sky (at night, ignoring the diffuse reflection of the air), you can't see the light. You don't know where the light is and how. far away, it shines. It will reflect as soon as your hand touches the light of the flashlight. Your eyes can be so intense that they dazzle you. If you move something closer to the sun, the solar radiation it receives will be too strong, the temperature will be very high and most objects will vaporize. It's a paradox: the temperature one meter from the sun is low, but it cannot be measured because the measuring tools are burned out. I still have the impression that the sun is like steel that turns into gas when it touches it (sounds like a primary school textbook).
The gravity generated by the earth's mass is perfect. It can attract gases and prevent them from escapinger in space, but it does not attract them to the point that they cannot form a gaseous state and condense.aggregate into a solid state. Whether a planet has too much or too little mass is the main factor in determining whether it has an atmosphere.
This heat is linked to the humidity of the air and the movement of the earth's atmosphere. In summer, even if the land is empty, you will see layers of waves appearing before your eyes. This is the energy of the Earth's rotation. The part of the Earth exposed to the sun always generates heat and movement. Different terrain and rugged terrain form the natural world. Everything in the world will exist naturally as long as there are conditions. Three modes of heat transfer: 1. Thermal convection, which is the way in which gases and liquids absorb and transfer thermal energy, 2. Thermal conduction, which is the way in which solid materialstransfer thermal energy, 3. Thermal radiation. , substances that emit heat and emit heat, such as the sun and stars, all transfer thermal energy in this way. Substances have the ability to absorb and release thermal energy!
People can feel the heat of the sun because they also have the ability to absorb heat energy. Molecules in the earth and air also have the ability to absorb heat energy from the sun during the day. and release it at night. The earth's atmosphere has a thermal insulation effect similar to that of a quilt, which can reduce the loss of solar thermal energy absorbed by the earth during the day. The moon does not have the same atmospheric protection as the earth. the heat absorbed during the day is immediately released into space at night, so the temperature difference between day and night is large.Mars' red color is not caused by stripping of its atmosphere. There is also a lot of red soil on the earth, and its color is only related to the color of the minerals it contains.
The sun shines directly on the moon and the temperature is 160 degrees? If the Moon is in a "vacuum" state, how is thermal energy transferred? What is the medium that transfers thermal energy? Can you justify it? According to "the change in temperature of the earth's soil between minus 40 degrees and 40 degrees above zero", the temperature that people feel when the sun shines directly on the earth should come from the middle of the atmosphere, and the atmosphere conforms to the convex lens principle.
The shape of the atmosphere is a “convex lens”. Sunlight passes through the atmosphere to form a focusing principle. Outside the atmosphere, the temperature is about 100 degrees belowor zero. When light enters the ground, it becomes about 30 degrees above zero. This is obviously the game we played when we were kids, "use a magnifying glass, the bottom of the bottle, the strong light produced by. the sun's rays, little hands and paper". This temperature can produce around 200 degrees. The temperature of the earth is entirely that of the atmosphere. "The "convex lens" function can also be judged from this. the same as the temperature of the earth. Do you understand?
Substances containing a core are called magnetons, and non-nuclear substances are called magnetons.Magnons are divided into cold magnetons such as electrons, ultraviolet rays, etc. and hot magnetons such as visible light, infrared rays, etc. The human eye cannot see any non-nuclear magnetic particles such as photons.can produce chemical reactions on the retina of the human eye is called visible light; this definition illustrates it perfectly: in fact, the human eye is also invisible to light in the visible light band, and what the eye perceives is just a chemical. reaction. If one is in space, the human eye cannot see indirect visible light, which is why astronauts feel like there is darkness around their bodies . 2. The temperature sensation of the human body is determined by the number of thermal magnetons accumulated in the unit volume of the human body and has nothing to do with molecular movement. 3. Absolute zero refers to the temperature scale value (-273.15°C) expected for the environment when the magnet is in a non-nuclear environment and the magnet is in a sub -athermal magnetic environment. 4. Magnons do not lose kinetic energye when they propagate in a vacuum and collide with each other.
5. When magnetons travel through space, their wavelength and amplitude disappear, so there is no scattering or diffraction. 6. The electrons in the pure crystal will produce pure light (light of the same wavelength), which will become a laser after oscillation; the light generated after the electrons hit the target in the vacuum accelerator is synchrotron radiation, which can produce spectrum according to its application needs. A pure light source with wider bandwidth has a wider range of applications. 7. The thermal magnet is in a state of absolute zero before touching the magnet. The "heating phenomenon" will only occur when it touches the magnet. The principle is this: when sunlight hits the earth (magnet), part of the light suddenly transforms into photons of greater masse and is reflected on people (magnet), and a part is directly stored on the surface of the earth (magnet) and then radiates diffusely towards people. On the body, the more photons (thermal magnetons) accumulated in a person's body, the higher the temperature will be. Therefore, how hot and cold a person feels is entirely determined by the number of thermal magnetons received. by the person. The principle of air conditioning is: the process of draining hot magnets from the environmental material (magnets) is the cooling process, and conversely, the process of injecting hot magnets into the environmental material is the heating process.
It is theoretically correct to say that there is no temperature in space, because no matter what matter is heated, how can there be temperature? But if you really use a thermometer to measure iter, the thermometer will be heated immediately! Otherwise, what are the spacecraft's solar panels used for?
In fact, everything about the universe is done by so-called experts. They still can't explain the size of the universe, why Jupiter is gaseous, how sunlight and heat are produced, and why sunlight. and heat are Why don't atoms float after fission? Is there gravity? Where does gravity come from? There are too many things that cannot be explained. Human civilization cannot extend over millions of years. The end of all is destruction, but we are only on the way. The earth also has its own lifespan, but its age is measured in billions, and the environment suitable for the existence of life is only a short moment in the life of the earth. Because human life is too short, it is impossible to feel life. changes of hundreds of millionsof years.
Of course, the bright sparks coming out of the steelmaking furnace are very hot. They go out and cool after leaving the oven. Compared to a larger mass of flying slag, the flame lasts relatively. longer, the temperature will drop relatively slowly. The earth is just steel slag flying out of a huge steel furnace, and its rotation speed is determined by the force at the exit of the steel furnace.
Affected by the temperature of space, the surface begins to condense, and due to the gravitational attraction of the sun and the moon, the surface continues to condense and breaks up, enters into constantly colliding and overlapping. It even rises and plunges into the center of the earth to form various mountainous landforms. However, as the temperature dissipates, the Earth's crust becomes thicker and thicker and the Earth's crust becomes less active than before.ant. In fact, every mass extinction of life on earth is caused by a plate that inserts vertically into the center of the earth. To some extent, it can melt the entire earth's crust into the earth's surface. the surface will no longer exist and the water vapor will evaporate and vaporize. The red-hot lava soil will begin to condense again.
The sun produces light on the earth. Light should transmit heat. The heat produced by light should exist in matter. As matter continues to increase, earth will. Getting hotter and hotter. When thermal energy reaches the extreme, the earth can produce volcanic eruptions. Heat particles escape from the earth and life forms on the earth disappear. of light particles, the temperature increases and life begins to flourish again.