1. I opened the door and (look) inside 2. Who (close) all the windows?
3. The plane (land) ten minules ago.
4. We (live) in that house when I was a baby
S. We _Churry) to the station to catch the train
6. Dad (not help) me with my homework
7. Dinosaurs (live) many years ago
8. My new shoes_(not cost) a lot of money .
9. We (buy) a new car
10.1 (put) sugar in my coffee
11. The glass_(fall) off the table
265
297
Ответы на вопрос:
дано си
v=25л 0,025 м³
p=900кг/м³
m-?
p-?
решение
m=pv
m=900кг/м³*0,025 м³=22,5кг
p=mg
p=22,5кг*10h: кг=225h
ответ: 22,5кг; 225h
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