Предмет: Физика, автор: lp717

Сколько воды, взятой при температуре 15 градусов по Цельсию, можно нагреть до 45 градусов по Цельсию. сжигая спирт массой 20 грамм и считая, что вся выделяемая при горении спирта энергия идёт на нагревание воды?

ПОЖАЛУЙСТА СРОЧНО НУЖНО РЕШЕНИЕ!

Ответы

Автор ответа: MashaPutnaj

дано q=2,7*10^7 Дж/кг m1=0,02 кг t1=15 C t2=45 C m- ?

Q1=Q
q*m1=c*m*Δt
m=q*m1/c*Δt=2,7*10^7*0.02/4200*30 (кг)

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: raihan96969696

номер 8 31бет 3 сынып Математика 3 бөлім

6 лет назад

Предмет: Немецкий язык, автор: jumechute

Нужно вставить слова в подходящим им предложения, за решение даю 65 балов

6 лет назад

Предмет: Английский язык, автор: neivangaj1234

Ребят, помогите пожалуйста, 40 баллов
Reading

1 Read the information about Brighton. Match the paragraphs with three of the headings. (Картинка прикреплена)

1 Brighton began as a small village. In 1500, there were only five streets: North Street, South Street, East Street, West Street, and Middle Street: There were a few cottages by the sea for fishermen, but there weren't any large buildings. Around 1750, people from London started to visit towns on the south coast because they believed that the sea was good for their health. Brighton became very popular. By 1875, it was large: own with a museum, a library, a hospital, and a royal palace. Today, it is a city with a population of nearly 250,000.

2 Brighton is a great place for music fans. Some of the most -fashionable clubs in the UK are in two streets in Brighton, ".Vest Street and Kings Road Arches, and well-known DJs often perform there. Every year in May, the Brighton Festival offers a program of theatre, dance, classical concerts, and opera. If you prefer other forms of entertainment, there are many museums, art galleries and theatres in Brighton. You can a so see films at the oldest independent cinema in the UK, The Duke Of York.

3 If you're interested in fashion, Brighton is the ideal place to shop. There are some large department stores, and also lots of smaller, independent clothes shops. These often sell more unusual clothes. The most famous area for shopping in Brighton is The Lanes. Here you can buy interesting jewelry, hats, shoes, perfume and all sorts of other things. There are also open-air markets where you can find great bargains!

2.Answer the questions.

1 How big was Brighton in 1500?2 Why did people start to visit the town around 1750?3 Where can you find the most fashionable clubs?4 What kind of music can you hear at the Brighton Festival?5 What's the most famous shopping area in Brighton called?6 Which sells more unusual clothes: the department stores other independent shops?

3 Match the highlighted words in the text with the definitions below.

1. famous 2. not part of a big company 3. men who go fishing as a job 4. outdoors 5. things that you can buy for a good price 6. a building for a king or queen, or their family 7. perfect

6 лет назад

Предмет: Литература, автор: milsounveronuka

Вспомните, кто из писателей взяв за основу литературную сказку, пересказал её по своему и создал, по сути, новою книгу - свою собственную. ( Кроме Буратино и Пиноккио)

9 лет назад

Предмет: Информатика, автор: picovanie

на другой берег нужно переправить козу капусту и волка при том 1 лодка на этой лодке поместится только охотник и кто нибудь с ним .Вопрос как переправить все эти козу капусту и волка по отдельности так чтоб все были целыми и невридимыми

9 лет назад