Предмет: Физика, автор: nastyavolkova201951

Определи, на сколько градусов можно нагреть воду массой 411 кг при сжигании бензина массой 0,2 кг, если считать, что теплота, выделившаяся при полном сгорании бензина, целиком пошла на нагревание воды. Удельная теплоёмкость воды равна 4200 Дж/(кг·°С), удельная теплота сгорания бензина — 46 МДж/кг.

Ответы

Автор ответа: dzhinnivafelka

Ответ:

Дано: m=546кг.

М= 0.2 кг.

n = 4200 Дж/( кг.°С)

q=43Mдж/кг.

Найти : ∆t=? Решение : Q1=cm∆t

Q2=qM

Q1=Q2

cm∆t=qM

∆t=(qM)/(cm)

∆t=(43000000*0.2)/(4200*546)=3.75=3.8°C

Ответ : вода нагреется на 3.8°С .

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2.What parts does the island of Great Britain consist of?
3.How many parts is Ireland divided into?
4.What is the official name of Great Britain?
5.Name the seas and oceans the country is washed by.
6.How large is the territory of the UK?
7.How are the people living in the UK called?
8.Why is the climate of the British Isles moderate?
9.What is the highest mountain in the UK?
10.What are the longest and most important rivers in the UK?
11.What is the capital of the country?
12.Prove that the UK has a very convenient position.
13.Give the names of famous people of Great Britain.
14.What type of state is the UK?
15.Who rules the country in fact?
16.How often do the elections take place?

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