Viktoria1289
28.12.2020 15:24

А1-0,6 а2-0,8 а3-1,8 а-80°​

Нажмите на рекламу ниже и сразу увидите ответ
Популярные вопросы:
Ответ:
zizigi
26.03.2023 11:13

My family is not big.
I Christine. I am 11 years old and I study at a secondary school. I'm tall. I love to dance and learns.
My mother's name is Nataliya Yurievna. Her 38 years., and she works as a stylist in the store. My mother is very stylish and very strict.
My dad's name is Dmitriy. His 41 year, and he works in the office. My father was very strict and very smart. He loves to play Board games, and we often with them in their play.
My grandmother did not live together with us, but she came to me every day. And on this I come to it every weekend and holidays. We are walking a her dog and then I read my favorite book of fiction. I go to sleep about 12 hours on the weekends and during the 10 on weekdays.
It so happened that my parents got divorced, and I live alone, in a place with my mother.
I really want to live with my grandmother. We are friendly with my grandmother and very well get along.

0,0(0 оценок)
Ответ:
МилаяПолина
15.04.2020 05:58
1) Q = cmΔt ----------------------> Δt = \frac{Q}{cm}

Q - кол-во теплоты 
с - удельная теплоёмкость ( для алюминия 920 Дж/кг * С )
m - масса ( 2 кг )

Q = c₁m₁Δt₁ 

c₁ = 4200 Дж/кг * С 
m₁ = 880 г = 0,88 кг 
Δt₁ = t₂ - t₁ = 100 C - 0 C = 100 C 

Q = 4200 * 0,88 * 100 = 369600 Дж

Δt = \frac{369600}{920 * 2} = \frac{369600}{1840} ≈ 200 C

2) Q = (c₁ + c₂) * (m₁ + m₂) * Δt

c₁ - удельная теплоёмкость алюминия ( 920 Дж/кг * С )
с₂ - удельная теплоёмкость воды ( 4200 Дж/кг * С )
m₁ - масса кастрюли ( 800 г = 0,8 кг )
m₂ - масса воды ( 5 л для воды = 5 кг )
Δt - разности температур ( 100 С - 10 С = 90 С )

Q = (920 + 4200) * (0,8 + 5) * 90 = 5120 * 5,8 * 90 = 2672640 Дж
0,0(0 оценок)
Полный доступ
Позволит учиться лучше и быстрее. Неограниченный доступ к базе и ответам от экспертов и ai-bota Оформи подписку
logo
Начни делиться знаниями
Вход Регистрация
Что ты хочешь узнать?
Спроси ai-бота