10:30
Decibel Scale | Mechanical waves and sound | Physics | Khan Academy
Recommended
hotcomm
What? It turns out you are like this: City University of Macau: After the College Entrance Examination: Analysis of Undergraduate Admission Requirements of City University of Macau. Original article by Yuna for studying abroad. Reprinting is prohibited!
Not satisfied with the college entrance examination? No two copies have arrived? Check it out: Analysis of undergraduate admission requirements of City University of Macau
hotcomm
Article 1 In order to ensure the smooth progress of the school's undergraduate admissions work and effectively protect the legitimate rights and interests of the school and candidates, in accordance with the "Education Law of the People's Republic of China", the "Higher Education
Authoritative Release | Northwest University 2021 Full-time Ordinary Undergraduate Admissions Regulations
hotcomm
From 0 to 24:00 on August 7, 31 provinces and the Xinjiang Production and Construction Corps reported 96 new confirmed cases, including 15 imported cases and 81 local cases;
Many schools in Hebei have postponed the start of school; 3 places are urgently searching for people! Close contacts took buses or went to restaurants
hotcomm
Part of the restored "Tianlu Linlang" collection. Photo by reporter Hong Xing. An investigation by the National Library of Ancient Books found that about 10%, or more than 300 volumes, of the more than 270 "Tianlu Linlang" ancient books in the collection, which contains more than
Flocculation, adhesion, and breaking when touched...how to repair such "Tianlu Linlang" in 8 years
hotcomm
Recently, the National Development and Reform Commission issued a document approving the issuance of special bonds for the construction of urban underground comprehensive pipe corridors by Hunan Deshan Construction Investment Co., Ltd. not exceeding 1.2 billion yuan.
"Good news" 1.2 billion yuan! Special bonds for the construction of underground comprehensive pipe gallery in Changde Economic and Technological Development Zone were approved for issuance
hotcomm
At such a critical moment, some politicians in Taiwan are using the lives of ordinary citizens as bargaining chips. They are unwilling to accept domestically produced vaccines, but are grateful for the "blank checks" for vaccines issued by the United States and Japan, causing cit
Are foreign vaccines better than domestic vaccines? The epidemic in Taiwan is getting out of control, and officials are still touting foreign vaccines
hotcomm
In judicial practice, courts often refer to the "equitable subordination principle" to solve such problems, but the application of this principle may produce opposite results depending on the circumstances.
The Origin and Judicial Practice of the Principle of Equitable Subordination "Good Picture·Civil and Commercial Affairs"
hotcomm
In Taiwan, China, the "Aesthetic Textbook" designed by the "Aesthetic Cell" team won the German Red Dot Design Award. The team believes that "textbooks are the fairest media, and everyone can have one regardless of the urban-rural gap." Well-designed textbooks provide children wi
Design and aesthetics in textbooks: looking at the cases of Taiwan and Japan
hotcomm
Another new highlight of cross-strait education integration in the development of cross-strait integration has been launched in Fujian on a trial basis. That is the recent pilot test for the first time in 2022 by 19 colleges and universities in Fujian based on Taiwan's "uniform e
Use the "unified test" to study in mainland China and realize your dream! A great blessing for Taiwan’s higher vocational students
hotcomm
1 Administrative Penalty Decision of Changde Municipal Bureau of Quality and Technical Supervision, Quality Supervision Penalty Word [2018] No. 14 1. Basic information of the administrative counterpart: Administrative counterpart: Wuling District Maijiale Tobacco and Liquor Firm
"Penalty" Changde Quality and Technical Supervision Bureau issued 8 administrative penalty decisions
Relation Video
40 Decibels...
0:14
![How Loud Is The Sound? [Decibel Comparison] - DayDayNews](https://i.ytimg.com/vi/LPWbwHtORJE/hqdefault.jpg?sqp=-oaymwEcCOADEI4CSFXyq4qpAw4IARUAAIhCGAFwAcABBg==&rs=AOn4CLCmv3tvUQ0LhBVdqW7un7rGsIqeAQ)
74 Decibels...
0:40
hotcomm Relation Video
Flower Moon...
0:09
Site video recommendation
hotcomm Latest News
hotcomm
Friends who have watched "That Year the Flowers Bloomed and the Moon Was Full" must still remember every character in the play, including the infatuated Shen Xingyi and the heart-warming Wu Pin.
"That Year the Flowers Bloomed" didn't have a single line but was more popular than Chun Xing Wu Yi, with a strange name and an amazing identity
hotcomm
The maids and servants below are all stealing the show, and almost every actor is in top form. Regardless of bugs, everyone's cooperation makes this movie a good one. The plot of the work has gradually become clear. Zhou Ying, played by Sun Li, regained her strength and decided t
There is also a supermodel among the maids in "That Year the Flowers Bloomed". Chun Xing's acting skills are amazing, and her temperament surpasses Hu Yongmei's
hotcomm
In the video, Li Yapeng is wearing a crisp black suit, and his wife Haiha Jinxi is wearing a traditional Yi costume. The two are holding hands and facing the camera with a smile, and their happiness is beyond words.
The prodigal Li Yapeng officially announced that he has given birth to a son, and his wife Haiha Jinxi is happy. This woman is not simple.
hotcomm
Since actor Li Yapeng divorced from singing queen Faye Wong on September 13, 2013, the former couple have found their own happiness. Faye Wong returned to the arms of her old love Nicholas Tse through the help of her good sister Zhao Wei, while Li Yapeng generously admitted his n
Susie is out! Li Yapeng officially announces his new love, a 19-year-old supermodel champion, who has a temperament similar to that of Sister Fei
hotcomm
On March 14, Li Yapeng officially announced the good news on social platforms that he was married to his wife Haiha Jinxi and had a child. Li Yapeng happily wrote: "Join hands on the road of life and name it after the new life."
The diva’s ex-husband has a son from his second marriage: Is the marriage between becoming a father at the age of 50 and 19 years apart really because of love?
hotcomm
Recently, some netizens posted a group photo of Li Yapeng and his girlfriend Haiha Jinxi leaning on a motorcycle, revealing that the two were traveling in Yunnan. It is necessary to mention Haiha Jinxi first. She is a girl born in the 1990s, 19 years younger than Li Yapeng. In 20
Li Yapeng takes his post-90s girlfriend to ride in Yunnan, while Li Yan and her best friend Wang Manxi show off their swimsuits on the beach in Sanya
Site Latest News
hotcomm
Recently, many netizens said that they were blocked by women's volleyball player Wang Yunxiang because they posted some dissatisfaction with Wang Yunxiang's personal performance on the Internet, and Wang Yunxiang directly blocked them after seeing it. Some attentive netizens also
During the competition, she still had time to go online and block netizens. Wang Yunxiu made people angry, so she should concentrate on improving her skills.
hotcomm
Friends who have watched "That Year the Flowers Bloomed and the Moon Was Full" must still remember every character in the play, including the infatuated Shen Xingyi and the heart-warming Wu Pin.
"That Year the Flowers Bloomed" didn't have a single line but was more popular than Chun Xing Wu Yi, with a strange name and an amazing identity
hotcomm
The maids and servants below are all stealing the show, and almost every actor is in top form. Regardless of bugs, everyone's cooperation makes this movie a good one. The plot of the work has gradually become clear. Zhou Ying, played by Sun Li, regained her strength and decided t
There is also a supermodel among the maids in "That Year the Flowers Bloomed". Chun Xing's acting skills are amazing, and her temperament surpasses Hu Yongmei's
hotcomm
In the video, Li Yapeng is wearing a crisp black suit, and his wife Haiha Jinxi is wearing a traditional Yi costume. The two are holding hands and facing the camera with a smile, and their happiness is beyond words.
The prodigal Li Yapeng officially announced that he has given birth to a son, and his wife Haiha Jinxi is happy. This woman is not simple.
hotcomm
Since actor Li Yapeng divorced from singing queen Faye Wong on September 13, 2013, the former couple have found their own happiness. Faye Wong returned to the arms of her old love Nicholas Tse through the help of her good sister Zhao Wei, while Li Yapeng generously admitted his n
Susie is out! Li Yapeng officially announces his new love, a 19-year-old supermodel champion, who has a temperament similar to that of Sister Fei
hotcomm
On March 14, Li Yapeng officially announced the good news on social platforms that he was married to his wife Haiha Jinxi and had a child. Li Yapeng happily wrote: "Join hands on the road of life and name it after the new life."
The diva’s ex-husband has a son from his second marriage: Is the marriage between becoming a father at the age of 50 and 19 years apart really because of love?