нужен Read each sentence. Then make two new sentences in the PASSIVE:
1. People say Tom Cruise is the richest movie star.
a) It is said that Tom Cruise is the richest movie star.
b) Tom Cruise is said to be the richest movie star.
2. Everybody thinks that Hakan is a good football player.
a) It ………………………………………………………………………...
b) Hakan …………………………………………………………………...
3. They say that his books are still popular. a) It
………………………………………………………………………….
b) His books ……………………………………………………………
4. They report that at least 10.000 dolphins are caught in the nets of tuna fishers every year.
a) It …………………………………………………………………………...
b) At least 10.000 dolphins …………………………………………………...
5. They estimate that 1500 square kilometers of rainforests is cut every year.
a) It …………………………………………………………………………….
b) 1500 square kilometers of rainforests ……………………………………….
6. We knew that pencil lead is made from graphite, clay, water and wax.
a) It ……………………………………………………………………………
b) Pencil lead …………………………………………………………………
7. They reported that the railway line was buried under tons of rock and earth.
a) It ……………………………………………………………………………….
b) The railway line ……………………………………………………………….
8. People don’t think that inflation will go down. a) It
……………………………………………………………………………….
b) Inflation ………………………………
9. People expect that the third bridge will be built over the Bosphorus Strait.
a) It ……………………………………………………………………………….
b) The third bridge ………………………………………………………………
10. People believe that he is living abroad.
a) It ……………………………………………………………………………….
b) He ……………………………………………………………………………….
Read each sentence. Then make two new sentences in the PASSIVE:
1. People say Tom Cruise is the richest movie star.
a) It is said that Tom Cruise is the richest movie star.
b) Tom Cruise is said to be the richest movie star.
2. Everybody thinks that Hakan is a good football player.
a) It ………………………………………………………………………...
b) Hakan …………………………………………………………………...
3. They say that his books are still popular. a) It
………………………………………………………………………….
b) His books ……………………………………………………………
4. They report that at least 10.000 dolphins are caught in the nets of tuna fishers every year.
a) It …………………………………………………………………………...
b) At least 10.000 dolphins …………………………………………………...
5. They estimate that 1500 square kilometers of rainforests is cut every year.
a) It …………………………………………………………………………….
b) 1500 square kilometers of rainforests ……………………………………….
6. We knew that pencil lead is made from graphite, clay, water and wax.
a) It ……………………………………………………………………………
b) Pencil lead …………………………………………………………………
7. They reported that the railway line was buried under tons of rock and earth.
a) It ……………………………………………………………………………….
b) The railway line ……………………………………………………………….
8. People don’t think that inflation will go down. a) It
……………………………………………………………………………….
b) Inflation ………………………………
9. People expect that the third bridge will be built over the Bosphorus Strait.
a) It ……………………………………………………………………………….
b) The third bridge ………………………………………………………………
10. People believe that he is living abroad.
a) It ……………………………………………………………………………….
b) He ……………………………………………………………………………….
Значит р(ал.)< p(м.) на 3 раза (2,7г/см^3/ 8,9г/см^3=~3)
2.m=p*V
p(бетона)=2200кг/м^3
m=2200кг/м^3*3м^3=6600кг
3.p=m/V
p=71г/10см^3=7,1г/см^3.
Это цинковый шарик (материал - цинк).
4.m=p*V
V=abc
a=80см=0,8м, b=1,5м, c=5мм=0,005м
V=0,8*1,5*0,005=0,006м^3
p(стекла)=2500кг/м^3
m=2500кг/м^3*0,006м^3=15кг
5.V=m/p
V=490кг/7800кг/м^3=0,0628м^3
V=Sh*7
S=1,5*1=1,5м^2
h(одна)=V/7S=0,0628м^3/1,5м^2*7=0,006м=6мм
6. ρ(ст.)=7,8*10^3 кг/м^3
ρ(ал.)=2,7*10^3 кг/м^3
V=Sh
p=m/V
p=m/Sh
Sh=p/m
h=m/pS
m и S одинаковие, тогда получается, что h=p, р(ст.)<р(ал.) и h(ст.)<h(ал.)
р(ст.)/р(ал.)=7,8*10^3 кг/м^3/2,7*10^3кг/м^3=2,9~3 ( h(ал.) 3 раза болше).
Дано:
V = 10дм²
ρ = 800 кг/м³
Найти: F - ?
1. Единицы измерения переводим в систему СИ:
V = 10дм³ = 10х10⁻³м³= 0.01 м³
2. Формула для расчета силы тяжести:
F = mg (1)
где m - масса керосина, кг; g - ускорение свободного падения (10 Н/кг)
Формула для расчета массы:
m = ρV (2)
Подставляем значения в формулу (1):
F = ρVg = 800*0.01*10 = 80 Н
ответ: 80 Н