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Material Properties 101
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Metals such as copper, silver, aluminum, and iron have strong electrical conductivity and are called conductors. Plastic, glass, rubber, porcelain, etc. are almost non-conductive and are called insulators. There is also a type of substance whose conductivity is between that of a
Let’s learn together with everyone what “semiconductor” is
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The advantages and disadvantages here are not necessarily the literal meaning of strength or weakness, but rather the ability to adapt to the natural environment. There are 1.4 billion people in China and more than 7 billion people in the world. So many people are not worth menti
Is it possible that being unmarried and infertile is eliminating inferior genes?
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Let me ask you a very common sense question, can two different organisms have offspring? Without thinking about it, everyone will say no. Because of reproductive isolation, two organisms cannot produce offspring.
Five women were recruited for a crossbreeding experiment with chimpanzees. What was the result?
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The Fields Medal is one of the highest international awards in the field of mathematics, equivalent to the Olympic mathematics gold medal. Because the Nobel Prize does not include a mathematics prize, the award is also known as the "Nobel Prize" in mathematics. Every four years,
Why did these four young people win the "Nobel Prize" in mathematics?
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An international team of astrophysicists studied the emergence of ion holes in Earth's magnetotail and assessed their impact on space weather. They found that ion holes propagate obliquely toward the local magnetic field. The results of this study will contribute to a better unde
Scientists can predict space weather more accurately
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Viruses can change the host's odor to attract mosquitoes: we know that mosquitoes (mosquitoes) are the deadliest animals in the world. Mosquitoes transmit diseases and are vectors of viruses and pathogens.
Could the virus make people more attracted to mosquitoes?
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Flexible all-perovskite tandem solar cell with 24.7% efficiency Lightweight and flexible perovskites are very promising materials for manufacturing photovoltaics. However, the highest efficiency they have reported so far is about 20%, which is much lower than the efficiency of ri
Flexible all-perovskite tandem solar cells with 24.7% efficiency
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1. Shale is a kind of [ ] rock, which is mainly formed from clay after a long period of deposition and subjected to a certain pressure and temperature. A. Sedimentation B. Metamorphism C. Magma Answer: A.
Summary of four-person competition rock questions
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Geometrically complex parts are manufactured using wax casting. However, high-quality castings are not always ensured when using this method: defects often form on the product surface. Chemists from the Perm Polytechnic University suggested a technique that would avoid irregulari
Perm Polytechnic University finds way to improve quality of parts with complex shapes
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Entropy is an important concept in thermodynamics, but it is also a difficult concept to understand. As my college physics teacher often said: There are (probably) only 4 or 5 people in this world who really understand entropy, and I don’t belong to them. Compared to other quanti
There are (probably) only 4 or 5 people in this world who truly understand entropy, and I don't belong to them
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Inside a US hospital (data map) Overseas Network, July 7. According to a report by NBC New York on the 5th, a new study from Yale University showed that a cancer patient in Connecticut, USA, was infected with the new coronavirus for 471 days. During this time, the virus mutated t
A patient in the United States was infected with COVID-19 for 471 days, and the virus mutated three times in the body
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Cockroaches are commonly known as Xiaoqiang, and I believe everyone is familiar with them. Cockroaches are one of the oldest insects on earth, living at the same time as dinosaurs and other ancient creatures. It is even more than 100 million years earlier than the birth of the fi
Should you step on a cockroach if you see one at home?
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Some time ago, some netizens reported that a strange phenomenon of "thousands of flying swallows" appeared over Leshan, Sichuan. Thousands of swallows hovered over Leshan and made scalp-numbing screams. Seeing this scene, many netizens said: Is the "flying swallows" that appeared
The phenomenon of "flying swallows flying thousands of miles" in Sichuan has triggered heated discussions. What does it portend? A sign of an earthquake coming?
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There seem to be many secrets hidden in the deep and dark universe, and humans have been full of curiosity about them from the moment they gained intelligence. Fortunately, the universe is not impeccable. The little bits of starlight in the night sky are the key to deciphering th
Telescopes are indispensable for astronomical observation. Are astronomical telescopes expensive? It's kind of mobile and very cheap
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A sand battery works like a solar panel: it collects heat and stores it as energy. But sunny days are extremely rare in Finland, especially in winter. So Finnish experts have invented something similar - an eco-friendly battery with ordinary sand inside. New eco-friendly battery
The world's first sand battery has started working | It helps store thermal energy and heat places
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Ascletis is committed to developing and producing safe, effective, and affordable oral COVID-19 drugs globally. As a leading biotechnology company in China, Ascletis has submitted a new drug clinical trial application for the new coronavirus oral drug candidate RdRp inhibitor ASC
Ascletis’ oral COVID-19 drug candidate submits IND application in the United States
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Introduction: Nowadays, the Internet is really full of wonders. Some time ago, some green tea bitches and hooker girls often appeared on the Internet, but now there is a kind of cat girlfriend. How did the pronouns of their names evolve? of? What are the criteria for judging?
10 types of cat girlfriends that boys can’t resist. Is this your girlfriend? (Comics) I can’t stand it anymore
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The semiconductor "order-cutting storm" has officially arrived, and panel driver IC factories have fired their first shot. Affected by the weak demand for control panels and falling quotations, there are rumors in the industry that driver IC factories have slashed their foundry p
The wave of sales is officially here! Panel prices fell below cost, driving IC manufacturers to slash wafer production
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According to news on July 6, the latest report from market research organization TrendForce pointed out that almost all sizes of TV panels on the market have fallen below the cash cost.
I really can’t fall anymore! LCD panels have fallen below cost: Is this the opportunity to buy a TV at a bargain price?
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On June 10, a reporter from China Business News learned that after panel factories in Taiwan and South Korea reduced production in the second quarter, panel factories in mainland China also began to reduce production in June. It is expected that the entire industry will reduce pr
The panel industry has seen its biggest production cut in a decade, and LCD screen prices have fallen for more than a year, and the peak season is sluggish.
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Original: Feng Chui Mai Lang After a child is half a year old, many people will say that they can stop breastfeeding. They are one year old, why don’t they stop breastfeeding? Where is the nutrition? She's over a year old, why are she still drinking milk? ? I was speechless about
"Ignorance is more terrible than poverty." Don't give advice casually to avoid getting into trouble.
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The international oil price rose again at the close this morning, ending the previous two consecutive falling trends. Because the international oil price rose too much before, the current Brent crude oil price is still over 122 US dollars per barrel, and the US crude oil price is
On June 14, international oil prices "increased 0.21%", and tonight oil prices rose sharply by "370 yuan/ton"