Các phát biểu dưới đây đúng hay sai khi nói về nội năng của một vật? Đồ thị dưới đây mô tả sự thay đổi nhiệt độ trong quá trình nóng chảy của thiếc.
Các phát biểu dưới đây đúng hay sai khi nói về nội năng của một vật? Đồ thị dưới đây mô tả sự thay đổi nhiệt độ trong quá trình nóng chảy của thiếc.

Các phát biểu dưới đây đúng hay sai khi nói về nội năng của một vật? Đồ thị dưới đây mô tả sự thay đổi nhiệt độ trong quá trình nóng chảy của thiếc.
Nhiệt độ của thiếc không thay đổi trong suốt quá trình nóng chảy.
Nhiệt độ tăng dần, thiếc mềm dần rồi chuyển dần sang lỏng.
Thiếc bắt đầu nóng chảy ở nhiệt độ 232 oC.
Khi hóa lỏng hoàn toàn, nhiệt độ của thiếc giảm dần.
Hãy suy nghĩ và trả lời câu hỏi trước khi xem đáp án
"Nhiệt độ của thiếc không thay đổi trong suốt quá trình nóng chảy": Đúng.
"Nhiệt độ tăng dần, thiếc mềm dần rồi chuyển dần sang lỏng": Sai vì khi nhiệt độ tăng dần, đến khi đạt đến một giá trị xác định là nhiệt độ nóng chảy thì thiếc mới chuyển dần sang thể lỏng.
"Thiếc bắt đầu nóng chảy ở nhiệt độ 232 oC": Đúng.
"Khi hóa lỏng hoàn toàn, nhiệt độ của thiếc giảm dần": Sai vì khi hóa lỏng hoàn toàn, nhiệt độ của thiếc tăng dần.
Bộ Đề Kiểm Tra Tham Khảo Giữa Học Kì I - Môn Vật lí 12 - Kết Nối Tri Thức được biên soạn và tổng hợp những kiến thức cơ bản đã học nhằm giúp học sinh củng cố kiến thức, đánh giá năng lực, và chuẩn bị tốt hơn cho các kỳ thi quan trọng sắp tới.
Câu hỏi liên quan
Read the following passage and choose the correct answer that best fits each of the following blanks.
Scientists from the State University of New York recently conducted a test that found tiny pieces of plastic in bottled water. (28)_________ examined 250 bottles from nine countries and discovered that more than 90% of them (29)_________ microplastic particles. Sometimes, thousands of these tiny plastic pieces were in a liter of water. Only 17 bottles were plastic-free, with an average of ten plastic particles per liter.
The companies responsible for bottled water claim that their production (30)_________ the highest quality standards. However, scientists and doctors express concerns, even though there is no proof that the smallest plastic particles can harm the body. Most of the plastic is turned into waste and leaves the body through feces.
Apart from bottled water, plastic particles (31)_________ in beer, tap water, seafood, and even in the air. Bottled water is currently the fastest-growing beverage globally, with around $150 billion worth sold worldwide. It is essential for millions of people (32)_________ lack access to safe drinking water.
Choose the correct answer to fill in the blank in each of the following questions.
The analyst hit the __________ on the head when explaining the economic challenges facing the country.
Choose the correct arrangement of the sentences to make a meaningful paragraph/letter in each of the following questions.
a. As a student majoring in Hospitality Management, I am eager to gain practical experience in the field.
b. Dear Mr. Brown, I am writing to express my interest in the part-time waiter position at Sunshine Café as advertised on your website.
c. I considered myself to be organised, enthusiastic, and have good communication skills.
d. Thank you for considering my application.
e. I would appreciate the opportunity to discuss my application in person and am available for an interview any afternoon during the week.
f. Sincerely,
Choose the correct answer to fill in the blank in each of the following questions.
In the past, many people __________ the impact of human activities on global warming.
Choose the correct answer to fill in the blank in each of the following questions.
Vietnam __________ an ASEAN Summit yet, but it aspires to do so in the future.
Choose the correct answer to fill in the blank in each of the following questions.
Family conflicts can be __________ through open and honest communication.
Read the passage and choose the correct answer to each of the following questions.
1. In China, there are reports that many older people still believe in rumors and pseudoscience. Pseudoscience means things that are said, like facts, but are not proven by science. Recently, more scientists and people discussing science have been using the internet to fight against pseudoscience. However, it's hard for younger people to tell older people about it.
2. For example, last year, Dingxiang Doctor, a digital platform that revealed medical rumors online, released 101 articles that disproved common, inaccurate claims. However, many netizens said that when they forwarded the articles to family chat groups, they were questioned, scolded, and even removed from the group by older family members. An online survey last year by Tencent, one of China's biggest online businesses, indicated that nearly 40 percent of middle-aged and senior people had experienced online fraud, mainly related to healthcare products.
3. Yun Wuxin, who knows a lot about food and has been teaching about it for over ten years, thinks that older people didn't get training in thinking critically when they were young. So, they trust personal experiences, tradition, or superstition a lot. Young people today, though, have better training and question things more. Yun Wuxin says using new media like short videos, video blogs, and animations is excellent for young people. But older people still find traditional ways like TV, visits by scientists, neighborhood shows, and science columns in newspapers essential to understand science.
(35) The word “they” in paragraph 2 refers to ____________.
Write the correct form of the verbs in brackets.
Last year, my parents visited the place where they first met, ________ about their early days together. (reminisce)
Choose the best sentence that is written from the words and phrases in each of the following questions.
Generational differences, / shape / by / historical events, / influence / perspectives / various issues.
Read the following passage and choose the correct answer that best fits each of the following blanks.
Scientists from the State University of New York recently conducted a test that found tiny pieces of plastic in bottled water. (28)_________ examined 250 bottles from nine countries and discovered that more than 90% of them (29)_________ microplastic particles. Sometimes, thousands of these tiny plastic pieces were in a liter of water. Only 17 bottles were plastic-free, with an average of ten plastic particles per liter.
The companies responsible for bottled water claim that their production (30)_________ the highest quality standards. However, scientists and doctors express concerns, even though there is no proof that the smallest plastic particles can harm the body. Most of the plastic is turned into waste and leaves the body through feces.
Apart from bottled water, plastic particles (31)_________ in beer, tap water, seafood, and even in the air. Bottled water is currently the fastest-growing beverage globally, with around $150 billion worth sold worldwide. It is essential for millions of people (32)_________ lack access to safe drinking water.
Write the correct form of the words in brackets.
Governments in ASEAN countries must promote peace and _________, and Vietnam can contribute to these efforts. (stable)
Read the following passage and choose the correct answer that best fits each of the following blanks.
Scientists from the State University of New York recently conducted a test that found tiny pieces of plastic in bottled water. (28)_________ examined 250 bottles from nine countries and discovered that more than 90% of them (29)_________ microplastic particles. Sometimes, thousands of these tiny plastic pieces were in a liter of water. Only 17 bottles were plastic-free, with an average of ten plastic particles per liter.
The companies responsible for bottled water claim that their production (30)_________ the highest quality standards. However, scientists and doctors express concerns, even though there is no proof that the smallest plastic particles can harm the body. Most of the plastic is turned into waste and leaves the body through feces.
Apart from bottled water, plastic particles (31)_________ in beer, tap water, seafood, and even in the air. Bottled water is currently the fastest-growing beverage globally, with around $150 billion worth sold worldwide. It is essential for millions of people (32)_________ lack access to safe drinking water.
Choose the correct answer to complete each of the following exchanges.
Dan: Can I assist you with anything during your recovery?
Picky: __________ I appreciate it, but I'm okay.
Read the passage and choose the correct answer to each of the following questions.
1. In China, there are reports that many older people still believe in rumors and pseudoscience. Pseudoscience means things that are said, like facts, but are not proven by science. Recently, more scientists and people discussing science have been using the internet to fight against pseudoscience. However, it's hard for younger people to tell older people about it.
2. For example, last year, Dingxiang Doctor, a digital platform that revealed medical rumors online, released 101 articles that disproved common, inaccurate claims. However, many netizens said that when they forwarded the articles to family chat groups, they were questioned, scolded, and even removed from the group by older family members. An online survey last year by Tencent, one of China's biggest online businesses, indicated that nearly 40 percent of middle-aged and senior people had experienced online fraud, mainly related to healthcare products.
3. Yun Wuxin, who knows a lot about food and has been teaching about it for over ten years, thinks that older people didn't get training in thinking critically when they were young. So, they trust personal experiences, tradition, or superstition a lot. Young people today, though, have better training and question things more. Yun Wuxin says using new media like short videos, video blogs, and animations is excellent for young people. But older people still find traditional ways like TV, visits by scientists, neighborhood shows, and science columns in newspapers essential to understand science.
(33) What is the best title for the passage?
Choose the answer that is CLOSEST in meaning to the underlined word/phrase in each of the following questions.
Innovative waste management systems will promote recycling and reduce environmental impact.
Choose the best sentence that is written from the words and phrases in each of the following questions.
Over the last decade, / Vietnam / see / increased collaboration / fellow ASEAN nations.
Choose the correct answer to complete each of the following exchanges.
Jane: Your understanding of the younger generation is impressive.
Jasmin: __________ It helps in bridging the generation gap.
Choose the correct answer to fill in the blank in each of the following questions.
After a good night's sleep, people appear more __________ and awake.
Choose the correct answer to fill in the blank in each of the following questions.
__________ in different eras, family members often had generation gaps, causing misunderstandings.
Read the passage and choose the correct answer to each of the following questions.
1. In China, there are reports that many older people still believe in rumors and pseudoscience. Pseudoscience means things that are said, like facts, but are not proven by science. Recently, more scientists and people discussing science have been using the internet to fight against pseudoscience. However, it's hard for younger people to tell older people about it.
2. For example, last year, Dingxiang Doctor, a digital platform that revealed medical rumors online, released 101 articles that disproved common, inaccurate claims. However, many netizens said that when they forwarded the articles to family chat groups, they were questioned, scolded, and even removed from the group by older family members. An online survey last year by Tencent, one of China's biggest online businesses, indicated that nearly 40 percent of middle-aged and senior people had experienced online fraud, mainly related to healthcare products.
3. Yun Wuxin, who knows a lot about food and has been teaching about it for over ten years, thinks that older people didn't get training in thinking critically when they were young. So, they trust personal experiences, tradition, or superstition a lot. Young people today, though, have better training and question things more. Yun Wuxin says using new media like short videos, video blogs, and animations is excellent for young people. But older people still find traditional ways like TV, visits by scientists, neighborhood shows, and science columns in newspapers essential to understand science.
(34) According to paragraph 1, what is the mentioned problem of China?