1. My brother to the cinema last Sunday.
a) go
b) went
2. … you doing your homework now?
a) Are
b) Do
3. They will … football tomorrow.
a) play
b) played
4. We … breakfast together every morning.
a) have
b) has
5. … Bob often watch TV?
a) Does
b) Will
6. She drew a picture … .
a) today
b) yesterday
7. My mum usually … dinner.
a) is cooking
b) cooks
8. My friends … to the zoo last month.
a) went
b) go
9. What day … it today?
a) is
b) was
10. … you read a book every day?
a) Do
b) Are
11. I … my friend next week.
a) will meet
b) met
12. Ann … ice cream.
a) likes
b) like
13. We … happy last Sunday.
a) were
b) are
14. Listen! Katya … singing a song.
a) is singing
b) sings
15. I am going to the shop.
a) yesterday
b) now
Объяснение:
P = n k M V^2 / 3R => n = 3 R P / k M V^2 = 3*8,31*10^4 / 1,38*10^-23*2*10^-3*64*10^4=24,93*10^4 / 176,64*10^-22 = 0,141*10^26 мол-л/м^3
2. n = N / V; N = m / m0; m0 = M / Na
n = p Na / M = 0,13*6*10^23 / 32*10^-3 = 0,0243*10^26 мол-л/м^3
3. Ek=3/2 * k T; V^2= 3RT / M => T = M V^2 / 3R
Ek = 1,5 k M V^2 / 3R = 1,5*1,38*10^-23*32*10^-3*25*10^4 / 3*8,31 = 1656*10^-22 / 24,93 = 66,425*10^-22 Дж
4. P = 2/3 * Ek n = 2*5*10^-23*16*10^25 / 3 = 53,3*10^2 Па
1. My brother to the cinema last Sunday.
a) go
b) went
2. … you doing your homework now?
a) Are
b) Do
3. They will … football tomorrow.
a) play
b) played
4. We … breakfast together every morning.
a) have
b) has
5. … Bob often watch TV?
a) Does
b) Will
6. She drew a picture … .
a) today
b) yesterday
7. My mum usually … dinner.
a) is cooking
b) cooks
8. My friends … to the zoo last month.
a) went
b) go
9. What day … it today?
a) is
b) was
10. … you read a book every day?
a) Do
b) Are
11. I … my friend next week.
a) will meet
b) met
12. Ann … ice cream.
a) likes
b) like
13. We … happy last Sunday.
a) were
b) are
14. Listen! Katya … singing a song.
a) is singing
b) sings
15. I am going to the shop.
a) yesterday
b) now
Объяснение: