V1 1. Say if the statements true or false.

1) In the UK school sports are usually called Sports.
2) All school children have sports lessons.
3) In many schools students have Games and other outdoor activities on Monday afternoons.
4) Westminster Comprehensive School is in Westminster.
5) In the first and second years the outdoor sports are football and hockey in the winter.
6) In the first and second years the outdoor sports are tennis and cricket in the summer.
7) In the third and fourth years they concentrate on gymnastics.
8) In the fifth year the students choose their favourite outdoor sport.
9) The boys usually choose football and cricket.
10) The girls usually prefer hockey and tennis.
11) The students do a lot of indoor sports and activities.
12) Every Sunday they play basketball.

2. Complete the sentences.

1) The students do a lot of …sports and activities.
a) indoor b) outdoor c)different
2) Every Monday … play basketball.
a) we b) they c) you
3) The … club meets on Tuesdays.
a) chess b) football c) volleyball
4) There is a chess club every Wednesday …..
a) evening b) afternoon c) morning
5) On …evenings a lot of children play table tennis.
a) Thursday b) Friday c) Monday
6) The students go to the school’s popular disco dancing club on ….
a) Wednesday b) Monday c) Thursday

3. Answer the questions.

1) Where is Westminster Comprehensive school situated?
2) What is the favourite student’s day of the week?
3) Are school sports usually called Games in the UK?

V2
1. Say if the statements true or false.

1) In the fifth year the students choose their favourite indoor sport.
1) The girls usually choose football and cricket.
2) The girls usually prefer hockey and tennis.
3) The students do a lot of indoor sports and activities.
4) Every Tuesday they play basketball.
5) The volleyball club meets on Tuesdays.
6) There is a chess club every Sunday evening.
7) On Thursday evenings a lot of children play table tennis.
8) Friday evenings are the favourite.
10)The students go to the school’s popular disco dancing club on Friday.
11)There is no school on Saturday.
12)Some students go to the swimming-pool on Saturday.

2. Complete the sentences.

1) … school children have sports lessons.
a) some b) all c) many
2) In many schools students have Games and other outdoor activities on … afternoons.
a) Wednesday b) Monday c) Tuesday
3) Westminster Comprehensive School is in ….
a) London b) Westminster c) Ireland
4) In the first and second years the outdoor sports are … in the winter
a) football and basketball b) volleyball and basketball c) football and hockey
5) In the first and second years the outdoor sports are …in the summer.
a) tennis and cricket b) tennis and hockey c) cricket and hockey
6) In the third and fourth years they concentrate on….
a) track and field events b) gymnastics c) athletics

3. Answer the questions.

1) Where is Westminster Comprehensive school situated?
2) What is the favourite student’s day of the week?
3) Are school sports usually called Games in the UK?

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Ответы на вопрос:

Лиля177

4,7(74 оценок)

дано:

m=1 г=0,001 кг

водород

v₁=2v₂=v₃

t₃=t₁

найти δs

решение

при адиабатическом процессе изменения количества теплоты не происходит. поэтому нет и изменения энтропии

p₁v₁/t₁=p₂v₂/t₂

t₁/t₂=p₁v₁/(p₂v₂)=2p₁/p₂

адиабатический процесс описывается уравнением

для двухатомного газа показатель адиабаты равен 7/5

при изохорном процессе:

для двухатомного газа cv=5/2 r

δs=m/m cv ln(t₃/t₂)=m/m cv ln(t₁/t₂)=5mr/(2m)*(-2/5 ln2)=(-mr*ln2)/m

молярная масса водорода m=0.002 кг/моль

универсальная газовая постоянная r=8.31 дж/(моль к)

δs=(-0,001*8,31*ln2)/0.002=-2.88 дж/k

ответ: -2,88 дж/k

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