Do you often be curious about some phenomena in your life, but you don't know the answers? The following will unveil the mystery of 9 commonly used cold knowledge for you, so that you can open your eyes and increase your knowledge!
Have you ever wondered why there are four seasons on Earth?This is due to the revolution and rotation of the Earth. Due to the tilt angle of the earth, the direct point of the sun moves back and forth on both sides of the equator, so that each region receives different hours of sunshine, thus forming the alternation of seasons.
The reason why the sky appears blue is because the atmosphere scatters the blue light in the sun's light. When sunlight hits the atmosphere, gas molecules and tiny particles in the atmosphere scatter the light, while blue light has a shorter wavelength and more scattering ability, so the sky we see appears blue.
*It is caused by the movement of the earth's crust and the interaction between plates in the Earth's interior. When the rocks in the earth's crust are squeezed or stretched beyond their tolerance limits, fractures occur, releasing energy and forming ** waves, which cause ground tremors.
Rainbows are formed by the refraction and reflection of sunlight through raindrops. Since sunlight is composed of seven colors: red, orange, yellow, green, blue, indigo, and purple, when sunlight enters the raindrops, different colors of light form a colorful rainbow due to different angles of refraction and reflection.
Beans contain a substance called "oligosaccharides", which is broken down by bacteria in the intestines to produce gases, mainly carbon dioxide and methane. When these gases accumulate to a certain level, they are excreted from the body by farting. So, eating too many beans is indeed easy to fart.
Lacrimation is caused by excessive secretion of tears on the surface of the eye due to irritation or emotional influences. The function of tears is to moisturize the eyes, wash away foreign bodies, and sterilize. When we feel pain, wind, emotion, etc., the tear glands secrete tears that moisten the surface of the eyeball and help us maintain clear vision and a comfortable feeling. When we cry, tears are also secreted due to the influence of emotions.
The reason why instant noodles have a curly shape is because of the hot air drying process used in the production process. The shape of the curls is conducive to the formation of gaps between the noodles, making the noodles dry more evenly, while the curly noodles are also easier to unfold and loosen when cooking. Curly noodles are also easier to transport and store, reducing the likelihood of breakage and sticking.
The jury is still out on why humans commonly use the right hand. One explanation is that in the process of human evolution, the right hand was used more frequently than the left hand, and the muscles and nervous system of the right hand were more developed, making the use of the right hand more convenient. Another explanation is the influence of human habits and cultural traditions, such as the right hand in the way most countries write and hold tools. Either way, it suggests that the common use of the right hand is the result of natural selection and cultural inheritance.
This is a common misconception. In fact, the relationship between the dissolution rate and the temperature is linear, that is, the dissolution rate accelerates with the increase of temperature. At room temperature, it is warm water rather than cold water that dissolves faster. This is because warm water can provide more energy, allowing the molecules to move faster and thus dissolve faster. However, it is important to note that some substances can decompose or undergo chemical reactions at high temperatures, and not all substances can be dissolved at high temperatures.