Предмет: Физика, автор: 134536485

При полном сгорании 0.5 кг топлива выделяется 22 Мдж теплоты. Какова удельная теплота сгорания топлива?Что это за топлива ?

Ответы

Автор ответа: Нино454

Дано:
Q=22Мдж=22000000Дж
m=0,5кг
Найти: q-?
Решение:
Q=qm q=Q:m
q=22000000:0,5=44000000Дж=44МДж

Ответ: 44МДж - Природный газ

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Stem Structure and Function
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Ответьте на вопросы по тексту (упр. 3.3):
1.What are the most important functions of a stem?
2.What can one see at the tip and along the sides of a stem?
3.What are bud scales?
4.In which part of the bud are new tissues produced?
5.What kinds of buds do you know?
6.What is the difference and lateral buds?
7.Can you find out how much the stem grew in length during the growing season? How?
8.What is the difference between a leaf scar and a bundle scar?
9.What kind of function do lenticels fulfill?
3.12. Укажите, являются ли данные утверждения истинными или ложными в соответствии с содержанием текста (упр. 3.3):
1.The stem absorbs water and minerals from soil.
2.One of the main functions of a stem is to transport food between the leaves and the roots.
3.Bud scales are the inner layers of a bud.
4.Having peeled away the bud scales, one can find a soft mass of green tissue, called the shoot apex.
5.Leaves and flowers can arise from both terminal and lateral buds.
6.Buds continue growing between growing seasons.
7.An internode is a section of a stem between nodes.
8.At leaf scars one can see bundle scars.
9.The bark of a woody stem has small round openings, called budscale scars.
10.Lenticels provide the exchange of gases between the atmosphere and the tissues of the stem.
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1.The structure of a bud
2.Lenticels no
3.Major functions of a stem
4.Buds during and between growing seasons
5.Terminal and lateral buds
6.A node
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