Relativity of Simultaneity (Thought Experiment & Lorentz Transformations)

2024/05/2001:03:04 science 30662

Relativity of Simultaneity (Thought Experiment & Lorentz Transformations) - DayDayNews

Relativity of Simultaneity (Thought Experiment & Lorentz Transformations) - DayDayNews

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The spring itself is elastic. After being compressed, the spring will have the tendency to return to its initial state, and therefore has elastic potential energy. We can think of it as the energy stored in the overall system of the spring. So the question is Question: If a compr - DayDayNews

The spring itself is elastic. After being compressed, the spring will have the tendency to return to its initial state, and therefore has elastic potential energy. We can think of it as the energy stored in the overall system of the spring. So the question is Question: If a compr

Put a compressed spring into strong acid. After the spring dissolves, where does the energy of the spring go?

06/09 1513

Researchers such as Gao Fu from the Institute of Microbiology, Chinese Academy of Sciences, have just published an article in NEJM introducing the neutralizing ability of volunteer sera with different vaccination programs against Omicron subtypes. Under similar conditions, two do - DayDayNews

Researchers such as Gao Fu from the Institute of Microbiology, Chinese Academy of Sciences, have just published an article in NEJM introducing the neutralizing ability of volunteer sera with different vaccination programs against Omicron subtypes. Under similar conditions, two do

Confused about how to get vaccinated? Pay attention to the latest NEJM work such as Gao Fu

06/09 1339

Researchers including Daohua Jiang from the Institute of Physics, Chinese Academy of Sciences, and William Catterall and Ning Zheng from the University of Washington analyzed the structure of the open-state cardiac sodium channel (NaV1.5) and analyzed its working principle (1). - DayDayNews

Researchers including Daohua Jiang from the Institute of Physics, Chinese Academy of Sciences, and William Catterall and Ning Zheng from the University of Washington analyzed the structure of the open-state cardiac sodium channel (NaV1.5) and analyzed its working principle (1).

Cell | Open state myocardial sodium channel structure

06/09 1285

As we said before, oracle bones are keel bones and belong to the fossil category. So the first question is, did these fossils appear first and then people carved them on them, or did people find these bones first and carve words on them, and then these bones gradually evolved int - DayDayNews

As we said before, oracle bones are keel bones and belong to the fossil category. So the first question is, did these fossils appear first and then people carved them on them, or did people find these bones first and carve words on them, and then these bones gradually evolved int

"Quest Files" Unsolved Mysteries of the World - The Black-Headed Man from the East 2

06/10 1017

Since the terms information and entropy are used in many branches of science, this may sound strange to those familiar with the second law of thermodynamics. How could information and entropy be identical? - DayDayNews

Since the terms information and entropy are used in many branches of science, this may sound strange to those familiar with the second law of thermodynamics. How could information and entropy be identical?

Conservation of information and the second law of thermodynamics, how can these basic laws be consistent?

06/09 1012

Recently, a scientific research team from Tokyo Metropolitan University in Japan discovered a new type of compound that can capture carbon dioxide directly from the environment and achieve the highest carbon capture efficiency so far of 99%, which is twice the efficiency of other - DayDayNews

Recently, a scientific research team from Tokyo Metropolitan University in Japan discovered a new type of compound that can capture carbon dioxide directly from the environment and achieve the highest carbon capture efficiency so far of 99%, which is twice the efficiency of other

Japanese scientists develop new carbon capture system that can quickly and directly capture low-concentration carbon dioxide

06/09 1986

In modern astronomical theory, the formation of important celestial objects such as double black holes, double neutron stars, and double white dwarfs are the result of the evolution of the shared envelope of binary stars. A few days ago, the research team of Academician Han Zhanw - DayDayNews

In modern astronomical theory, the formation of important celestial objects such as double black holes, double neutron stars, and double white dwarfs are the result of the evolution of the shared envelope of binary stars. A few days ago, the research team of Academician Han Zhanw

An Appointment in the Starry Sky | Exploring the evolution of binary stars. Scientists found direct evidence of shared envelope evolution for the first time

06/10 1930

Paris, July 7, local time, France had 161,265 new confirmed patients and 89 new deaths within 24 hours, bringing the total to 149,943. - DayDayNews

Paris, July 7, local time, France had 161,265 new confirmed patients and 89 new deaths within 24 hours, bringing the total to 149,943.

An increase of 161,000 cases! New variant of COVID-19 detected in Europe! Fuel subsidy launched in October! France plans to limit property tax increases! Pasta and meat prices are going crazy

06/10 1662

It might be tempting to use a cup with a green “Plant-Based” label for a cup of coffee, or see that the plastic utensils in your takeout are “100% compostable.” Some comfort. So could a plastic made from plants rather than petroleum actually melt harmlessly in the environment? - DayDayNews

It might be tempting to use a cup with a green “Plant-Based” label for a cup of coffee, or see that the plastic utensils in your takeout are “100% compostable.” Some comfort. So could a plastic made from plants rather than petroleum actually melt harmlessly in the environment?

"Science" Have you ever used environmentally friendly plastics made from plants?

06/10 1657

[Source: Shunyi Ecological Environment] Ubiquitous plastic products have facilitated people's lives, but the resulting plastic waste has caused a lot of pollution to the ecological environment... - DayDayNews

[Source: Shunyi Ecological Environment] Ubiquitous plastic products have facilitated people's lives, but the resulting plastic waste has caused a lot of pollution to the ecological environment...

"Popular Science" "Degradable Plastics" Revealed

06/10 1983

Pictured above is Physarum polycephalum, a protist, specifically a slime mold. The term "slime mold" does not refer to a specific single group, but is a broad term referring to several types of eukaryotes that behave similarly. Regardless, they possess intelligence, although it l - DayDayNews

Pictured above is Physarum polycephalum, a protist, specifically a slime mold. The term "slime mold" does not refer to a specific single group, but is a broad term referring to several types of eukaryotes that behave similarly. Regardless, they possess intelligence, although it l

Intelligent slime mold

06/11 1668

01. Nostalgia is a spaceship heading to Mars. ——Douyou 02. Since childhood, I have been taking care of the stars of all generations alone. ——Bai Helin's "Loneliness" 03. The stars should laugh, the universe is a remote place anyway. ——Pasternak 04. All my desires and contemplatio - DayDayNews

01. Nostalgia is a spaceship heading to Mars. ——Douyou 02. Since childhood, I have been taking care of the stars of all generations alone. ——Bai Helin's "Loneliness" 03. The stars should laugh, the universe is a remote place anyway. ——Pasternak 04. All my desires and contemplatio

Golden sentence#星星——All my desires and contemplations are the slowly exhaled air currents of this universe.

06/11 1169

Today, an insight into the vision of a once young cosmic artist shows the dust continuum and molecular lines of carbon monoxide and water seen in the pair of SPT0311-58 galaxies. (Image source: ALMA (ESO/NAOJ/NRAO)/S. - DayDayNews

Today, an insight into the vision of a once young cosmic artist shows the dust continuum and molecular lines of carbon monoxide and water seen in the pair of SPT0311-58 galaxies. (Image source: ALMA (ESO/NAOJ/NRAO)/S.

Water was discovered in ancient galaxies, which surprised astronomers. What happened?

06/11 1154

Text/Picture Yangcheng Evening News all-media reporter Wen Cong has completed about 700 experimental projects, filling many gaps in my country's scientific research field... Next month, the China Spallation Neutron Source (CSNS) will have been in operation for four years. With th - DayDayNews

Text/Picture Yangcheng Evening News all-media reporter Wen Cong has completed about 700 experimental projects, filling many gaps in my country's scientific research field... Next month, the China Spallation Neutron Source (CSNS) will have been in operation for four years. With th

Filling in many scientific research gaps! The China Spallation Neutron Source will be in operation for four years丨The party flag is flying high at the grassroots level

06/11 1511

In fact, we are not unfamiliar with the term mycotoxins. They generally exist in grains. The detection of mycotoxins can be carried out on-site. When choosing instruments for testing, we must choose brands with good quality. - DayDayNews

In fact, we are not unfamiliar with the term mycotoxins. They generally exist in grains. The detection of mycotoxins can be carried out on-site. When choosing instruments for testing, we must choose brands with good quality.

Introduction to applicable industries of mycotoxin detectors

06/11 1040

How should we choose testing instruments? When choosing together, we should focus on the quality of the product. Speaking of instruments, online residual chlorine analyzers have a wide range of uses. They are not only very accurate in detecting residual chlorine content, but can - DayDayNews

How should we choose testing instruments? When choosing together, we should focus on the quality of the product. Speaking of instruments, online residual chlorine analyzers have a wide range of uses. They are not only very accurate in detecting residual chlorine content, but can

Instructions for using online residual chlorine analyzer

06/11 1125

Suddenly I felt that my IQ was not enough: I knew every word in it. But even together, I can't understand anything. If your child has a cold or fever, take him to the hospital. Most doctors will ask him to do a routine blood test. - DayDayNews

Suddenly I felt that my IQ was not enough: I knew every word in it. But even together, I can't understand anything. If your child has a cold or fever, take him to the hospital. Most doctors will ask him to do a routine blood test.

Be careful! The blood routine report has these three arrows, it may be... leukemia!

06/11 1314

Author: Xiaoshou Jingmen Traditional Chinese Medicine Hospital. Some scholars once proposed that there is a positive correlation between white blood cells (WBC) and C-reactive protein (CRP). The content of CRP increases rapidly a few hours after the onset of the disease, and the - DayDayNews

Author: Xiaoshou Jingmen Traditional Chinese Medicine Hospital. Some scholars once proposed that there is a positive correlation between white blood cells (WBC) and C-reactive protein (CRP). The content of CRP increases rapidly a few hours after the onset of the disease, and the

Summary | Why don’t WBC and CRP increase at the same time?

06/11 1939

As we all know, blood routine is the most basic and common clinical examination. Many patients are confused by the densely packed various indicators on the checklist. Some patients even start to fear that they are abnormal when they see that many indicators on the checklist are a - DayDayNews

As we all know, blood routine is the most basic and common clinical examination. Many patients are confused by the densely packed various indicators on the checklist. Some patients even start to fear that they are abnormal when they see that many indicators on the checklist are a

If these blood routine indicators are abnormal, you should be alert to blood diseases

06/11 1917

Bone marrow problems. The spongy center of your bones, your bone marrow, makes blood cells. Low white blood cell counts are often associated with bone marrow problems. Being around certain chemicals, such as benzene and pesticides, as well as certain types of cancer and cancer tr - DayDayNews

Bone marrow problems. The spongy center of your bones, your bone marrow, makes blood cells. Low white blood cell counts are often associated with bone marrow problems. Being around certain chemicals, such as benzene and pesticides, as well as certain types of cancer and cancer tr

Why is your white blood cell count lower than normal?

06/11 1709

Hemoglobin is like a delivery boy, responsible for delivering oxygen to various organs. Under normal circumstances, the hemoglobin concentration of an adult male is 120 to 160g/L; - DayDayNews

Hemoglobin is like a delivery boy, responsible for delivering oxygen to various organs. Under normal circumstances, the hemoglobin concentration of an adult male is 120 to 160g/L;

Don’t worry about the physical examination form. Learn these three tricks to let you know how to read the blood routine test form.

06/11 1668

Labor ability assessment, employee work-related injuries and occupational disease disability grades and appendices. Released by China National Standardization Administration Committee. A.1 Department of Neurology, Neurosurgery, and Psychiatry. - DayDayNews

Labor ability assessment, employee work-related injuries and occupational disease disability grades and appendices. Released by China National Standardization Administration Committee. A.1 Department of Neurology, Neurosurgery, and Psychiatry.

Work-related injury level 1-10 disability level and labor ability appraisal and grading standards

06/11 1488