Length contraction: the real explanation

2024/05/2001:03:04 science 373747

Length contraction: the real explanation - DayDayNews

Length contraction: the real explanation - DayDayNews

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Volcanoes are a common landform feature that give us the impression of danger, high temperature, and poison. Once we encounter a volcanic eruption at close range, our lives are likely to be in danger. This is relative to public perception, and is more based on the fact that the p - DayDayNews

Volcanoes are a common landform feature that give us the impression of danger, high temperature, and poison. Once we encounter a volcanic eruption at close range, our lives are likely to be in danger. This is relative to public perception, and is more based on the fact that the p

Do you think that you will definitely die if you fall into the volcanic lava? In fact, you are not.

06/01 1799

The oxygen content of the air is only about 40% of that in the plains, and the annual average temperature is below 0 degrees Celsius. Looking around, you can see the boundless plateau alpine desert grassland. This is the Qiangtang National Nature Reserve, known as the "forbidden - DayDayNews

The oxygen content of the air is only about 40% of that in the plains, and the annual average temperature is below 0 degrees Celsius. Looking around, you can see the boundless plateau alpine desert grassland. This is the Qiangtang National Nature Reserve, known as the "forbidden

Meteorological service records of "life forbidden zone"

06/01 1299

Some time ago, the world's first and currently only approved subcutaneous PD-L1 antibody drug was launched. As soon as the news came out, it sparked heated discussions among cancer patients. Many patients left messages asking what "subcutaneous PD-L1 antibody drug" is. Woolen clo - DayDayNews

Some time ago, the world's first and currently only approved subcutaneous PD-L1 antibody drug was launched. As soon as the news came out, it sparked heated discussions among cancer patients. Many patients left messages asking what "subcutaneous PD-L1 antibody drug" is. Woolen clo

Complete a tumor immunotherapy in 30 seconds! The world's first subcutaneous injection of PD-L1 antibody drug is launched

06/01 1274

Screenshot of page 15 of "People's Daily" on July 6, 2022. Original title: Let the public share the beauty of nature. The "National Scientific Literacy Action Plan" released in June last year clearly stated that we should vigorously promote the scientific spirit, cultivate ration - DayDayNews

Screenshot of page 15 of "People's Daily" on July 6, 2022. Original title: Let the public share the beauty of nature. The "National Scientific Literacy Action Plan" released in June last year clearly stated that we should vigorously promote the scientific spirit, cultivate ration

People's Daily丨Wang Kechao, director of science popularization at the Purple Mountain Observatory of the Chinese Academy of Sciences: Planting a scientific seed

05/31 1753

Introduction to the results At present, there is an urgent need to develop lightweight, flexible and efficient wave-absorbing materials. - DayDayNews

Introduction to the results At present, there is an urgent need to develop lightweight, flexible and efficient wave-absorbing materials.

Xi'an University of Technology: Carbon fiber/graphene/LDH composite materials for microwave absorption

05/31 1578

Of course, at this time, many people may say that the US moon landing - the Apollo program is fake. We have explained this many times. The US moon landing plan is not fake. It was brought back during the Apollo program. One gram of lunar samples was also given to China. - DayDayNews

Of course, at this time, many people may say that the US moon landing - the Apollo program is fake. We have explained this many times. The US moon landing plan is not fake. It was brought back during the Apollo program. One gram of lunar samples was also given to China.

US satellite lost contact while flying to the moon! Returning to the moon may be blocked again. When will China manned a manned landing on the moon?

06/01 1894

In the ocean of knowledge, your wisdom is just a grain of sand or a drop of water. All we have is a hungry heart, and we must constantly comfort it with knowledge. - DayDayNews

In the ocean of knowledge, your wisdom is just a grain of sand or a drop of water. All we have is a hungry heart, and we must constantly comfort it with knowledge.

Always stay hungry, keep learning, keep growing

06/01 1021

You may not know that some creatures in history were once considered mythical monsters, such as the Kraken spread among Nordic sailors, which was actually a real-life giant squid. The prototype of the creature Kaido in Japanese folklore is actually The Japanese giant salamander, - DayDayNews

You may not know that some creatures in history were once considered mythical monsters, such as the Kraken spread among Nordic sailors, which was actually a real-life giant squid. The prototype of the creature Kaido in Japanese folklore is actually The Japanese giant salamander,

What were once thought to be mythical monsters are actually 8 real creatures

06/01 1221

"We are the first unit in Jinan to build a high-performance neuroelectric information collection system. The team is engaged in this research to help humans understand the pathogenesis of brain nervous system diseases more clearly, reduce the pain of the disease for patients, and - DayDayNews

"We are the first unit in Jinan to build a high-performance neuroelectric information collection system. The team is engaged in this research to help humans understand the pathogenesis of brain nervous system diseases more clearly, reduce the pain of the disease for patients, and

Make "thought control" a reality? Jinan’s first brain-computer interface research center is developing

05/31 1383

On January 3, Ningling County, Shangqiu City, Henan Province held in-depth consultations with the Chinese Academy of Sciences on the degradable plastic project and discussed? The 300,000-ton PBAT project was launched in Ningling and a consensus on cooperation was reached. Yang Gu - DayDayNews

On January 3, Ningling County, Shangqiu City, Henan Province held in-depth consultations with the Chinese Academy of Sciences on the degradable plastic project and discussed? The 300,000-ton PBAT project was launched in Ningling and a consensus on cooperation was reached. Yang Gu

The Chinese Academy of Sciences’ 300,000-ton/year PBAT project plans to launch in “Kronville”

05/31 1934

On the 5th local time, the latest winner of the 2022 Fields Medal was announced at the International Mathematical Union Awards Ceremony held in Helsinki, the capital of Finland. Four young mathematicians from France, the United States, the United Kingdom and Ukraine were awarded - DayDayNews

On the 5th local time, the latest winner of the 2022 Fields Medal was announced at the International Mathematical Union Awards Ceremony held in Helsinki, the capital of Finland. Four young mathematicians from France, the United States, the United Kingdom and Ukraine were awarded

The "Nobel Prize" in mathematics, the 2022 Fields Medal announced

06/02 1714

The Tobacco Research Institute of the Chinese Academy of Agricultural Sciences, in collaboration with universities at home and abroad, has effectively reduced the phytotoxic effects of sulfonylurea herbicides on subsequent sensitive crops based on single-atom modified nanomateria - DayDayNews

The Tobacco Research Institute of the Chinese Academy of Agricultural Sciences, in collaboration with universities at home and abroad, has effectively reduced the phytotoxic effects of sulfonylurea herbicides on subsequent sensitive crops based on single-atom modified nanomateria

Worried about herbicide damage? Nanomaterial degradation technology is coming

06/02 1106

Acid and alkali resistant magnetic pumps can transport harsh fluid media such as highly toxic, flammable and explosive, high power, high temperature, high pressure and strong corrosion resistance. Because of its performance advantages of no shaft seal and no leakage, in recent ye - DayDayNews

Acid and alkali resistant magnetic pumps can transport harsh fluid media such as highly toxic, flammable and explosive, high power, high temperature, high pressure and strong corrosion resistance. Because of its performance advantages of no shaft seal and no leakage, in recent ye

How much do you know about the four major advantages of acid and alkali resistant magnetic pumps?

06/02 1935

In 1676, Dutch scientist Antoni van Leeuwenhoek used a homemade microscope to observe bacteria for the first time and revealed the existence of microorganisms to the world. Therefore, he is also known as "the father of protozoology and bacteriology." father". - DayDayNews

In 1676, Dutch scientist Antoni van Leeuwenhoek used a homemade microscope to observe bacteria for the first time and revealed the existence of microorganisms to the world. Therefore, he is also known as "the father of protozoology and bacteriology." father".

Subvert cognition! Scientists discover the world's largest bacteria: the size of a fly, visible to the naked eye

06/02 1113

In 1994, Bill Gates spent about $30 million to purchase Leonardo da Vinci's "Code Leicester," a famous manuscript that records Leonardo da Vinci's work on astronomy, mechanics, botany, mathematics, and Sketches and ideas for subjects such as architecture. Why spend so much money - DayDayNews

In 1994, Bill Gates spent about $30 million to purchase Leonardo da Vinci's "Code Leicester," a famous manuscript that records Leonardo da Vinci's work on astronomy, mechanics, botany, mathematics, and Sketches and ideas for subjects such as architecture. Why spend so much money

Learn about DeSci - making scientific breakthroughs possible

06/02 1969

On July 5, local time in the United States, NASA confirmed that CAPSTONE, the first probe in the "Return to the Moon" plan launched last week, experienced a communication failure on the way to the moon and has now completely lost contact with the earth. - DayDayNews

On July 5, local time in the United States, NASA confirmed that CAPSTONE, the first probe in the "Return to the Moon" plan launched last week, experienced a communication failure on the way to the moon and has now completely lost contact with the earth.

First launch failed! NASA's "microwave oven" probe lost contact, the US space agency began to seek cooperation from multiple countries

06/02 1249

Realme will release the "Year Quality Flagship" Realme GT2 Master Exploration Edition on July 12, when the Realme Buds Air3 Neo true wireless earphones will also be released simultaneously. Today, the official announced more information about this earphone. - DayDayNews

Realme will release the "Year Quality Flagship" Realme GT2 Master Exploration Edition on July 12, when the Realme Buds Air3 Neo true wireless earphones will also be released simultaneously. Today, the official announced more information about this earphone.

30 hours long battery life! Realme announces Buds Air3 Neo headphone specifications

06/03 1791

Compared with traditional riding, it has more realistic scene images to choose from. Users can not only strengthen exercise in leisure and entertainment, but also experience the joy of gaming. In addition, dynamic cycling is a very safe game. Regardless of the temperature, real-t - DayDayNews

Compared with traditional riding, it has more realistic scene images to choose from. Users can not only strengthen exercise in leisure and entertainment, but also experience the joy of gaming. In addition, dynamic cycling is a very safe game. Regardless of the temperature, real-t

Large screen dynamic riding software

06/03 1312

Tutorial on how to implement dual-open WeChat for enterprises: The premise is that if you log in with different mobile phones, it will not work for different companies under the same mobile phone, because the account on the computer will automatically log out when you log out of - DayDayNews

Tutorial on how to implement dual-open WeChat for enterprises: The premise is that if you log in with different mobile phones, it will not work for different companies under the same mobile phone, because the account on the computer will automatically log out when you log out of

How to implement dual opening of enterprise WeChat?

06/03 1486

In post-photography retouching or video editing, if you want to improve office efficiency, you need to connect an external professional monitor. This is not only to get a larger display screen, higher resolution and rich color presentation, but also to bring higher productivity t - DayDayNews

In post-photography retouching or video editing, if you want to improve office efficiency, you need to connect an external professional monitor. This is not only to get a larger display screen, higher resolution and rich color presentation, but also to bring higher productivity t

A powerful tool for post-retouching, LG 27UP850N experience

06/03 1062

An hour of inquiry, inquiry, review, filling in, copying, signing, uploading, etc. made me feel from the bottom of my heart the cordial care of the government departments at all levels for the former soldiers. - DayDayNews

An hour of inquiry, inquiry, review, filling in, copying, signing, uploading, etc. made me feel from the bottom of my heart the cordial care of the government departments at all levels for the former soldiers.

Recalling the moment when the demobilized military personnel filled out the registration form

06/03 1476

1. Almost all current critical illness insurance can add secondary cancer benefits or cancer medical subsidies. In fact, critical illness insurance itself includes cancer protection, because the incidence rate of cancer is the highest. Many people worry that after a cancer claim - DayDayNews

1. Almost all current critical illness insurance can add secondary cancer benefits or cancer medical subsidies. In fact, critical illness insurance itself includes cancer protection, because the incidence rate of cancer is the highest. Many people worry that after a cancer claim

Cancer medical subsidy or secondary cancer benefit, which one is better?

06/03 1537