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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
Put a compressed spring into strong acid. After the spring dissolves, where does the energy of the spring go?
06/09
1513
Every spring and summer is the time when most young birds learn survival skills such as leaving the nest to fly and foraging for food. Due to rain, strong winds, physical strength and other reasons, many young birds will accidentally fall from the trees when learning to fly. . Wh
Don't pick up the birds on the roadside! Please let them go home on their own
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The metallurgical industry in the Qing Dynasty exceeded the level of the mid-Ming Dynasty. According to statistics from the Geological Survey, the national output of iron smelting by the old method was more than 170,000 tons in 1919, and the output of iron in the late Qing Dynast
Cold Knowledge of the Qing Dynasty - Metallurgical and Machinery Manufacturing Achievements of the Qing Dynasty
06/10
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On July 6, the team of Professor Luan Sheng from the University of California, Berkeley, published a paper in Nature entitled. A receptor-channel trio conducts Ca.
Nature | Luan Sheng's team has made important breakthroughs in the fields of plant sexual reproduction and signal transduction
06/10
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When it comes to invasive alien species, the first thing that comes to everyone's mind is that they have no natural enemies and reproduce wildly, seriously threatening the local ecological balance. Since the spring of 2022, a large number of invasive alien species have appeared i
A large number of white mud ants appear in Qingdao! A boat catches 200 kilograms a day, and not only are they inedible, but they also eat clams
06/09
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Recently, researchers such as Broad Institute of MIT and Harvard David Liu published a review in Cell to introduce the research progress in this field.
Cell | David Liu and others review the research progress of gene editing vectors
06/09
1876
One laboratory announced its new establishment. From a common sense point of view, since it has been released to the public, it must not be a small laboratory or it must be responsible for some insignificant fringe projects; since a laboratory has been established and publicly an
What big project is this new laboratory doing?
06/10
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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
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There is a terrifying legend circulating deep in the dense forests of Xishuangbanna, Yunnan. There is a man-eating blanket-like monster in the Lancang River that sucks human blood. It is extremely terrifying. Once encountered, there is no possibility of survival. Is this true?
The "blood-sucking blanket" in the Xishuangbanna River drags animals into the water and eats them. What kind of animal is it?
06/10
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We’ve seen blue skies on sunny days, black skies on rainy days, gray skies on cloudy days…but what about green skies? It seems that it is only possible in science fiction movies, or on some alien planet beyond the earth. Will there be green skies on the earth we live on? The worl
Is the green sky suddenly appearing in the United States an ominous sign?
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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
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.
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
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.
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
Instructions for using online residual chlorine analyzer
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1125
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Banks have always been an important sales channel for insurance products, referred to as bancassurance channels. The reason is the trust of depositors. People believe in banks, and they will naturally believe in the insurance financial products recommended by banks. When some net
Is the ICBC 5-year term insurance reliable? Detailed calculation of expected income of RMB 100,000 in single payment
06/17
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At 1 pm local time on July 12, the funeral of former Japanese Prime Minister Shinzo Abe was officially held at Zojoji Temple in Tokyo, Japan. During this period, a short farewell ceremony for Shinzo Abe's body will be held, which will only be attended by relatives and close peopl
"Taiwan independence" elements attended Abe's funeral, but China was not invited to attend and has lodged representations with Japan
06/17
1091
At this time, the Japanese lost four fleet aircraft carriers at Midway, which was a blessing in disguise for Shokaku and Zuikaku. A large number of crew members were added to the flight team, and their combat effectiveness was enhanced.
Aircraft Carrier Shokaku 3 - Desire and glory vanished into ashes under the sunset in Santa Cruz
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These shameless words and deeds, which are equivalent to those of mourning a concubine, immediately aroused doubts and condemnation in public opinion on the island. Taiwan's New Party clearly pointed out that Shinzo Abe is no longer the current head of state of Japan. According t
Still treating Taiwan as a Japanese colony? On the day of Abe’s funeral, Tsai Ing-wen ordered flags to be lowered to half-mast in mourning
06/17
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In this regard, some media warned the Kishida Fumio government "not to open the magic box of constitutional amendments," but the Washington Post publicly stated its support for "the legalization of Japan's military."
The US "Washington Post" advocates "legitimizing Japan's military capabilities" to "defend Taiwan"
06/17
1899
Your Lie in April Author: Naoji Shinkawa Introduction: Arima Kousei's mother wanted to train Arima to become a world-famous pianist, and Arima lived up to her mother's expectations and won many piano competitions when he was in elementary school. Grand prize.
July is the day for love, and it turns out that shoujo anime is the most popular.
06/17
1251