Вопрос школьника по предмету Физика
Объём ящика 0,5м в кубе, его вес грузом 4000Н. Вспывёт он или утонит, если поместить его в воду
Ответ учителя по предмету Физика
Дано
V=0,5m^3
Ft=4000H
pB=1000kg/m^3
Nayti: Fa
Fa=pB*V*g
Fa=1000kg/m^3*0.5m^3*4H/kg=8000H
Fa>Ft,значит этот ящик всплывёт
Ответ: всплывёт
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Put the sentences in the right order.
1.Tripp tells the reporter a story of the girl from the village.
2.Ada tells her mother a lie in order to go to New York.
3.Tripp takes Ada to a boarding-house.
4.Tripp looks more miserable than ever.
5.Tripp asks the reporter to spend three dollars on the girl.
6.They see the girl sitting in the parlor and crying.
7.Ada says that she has never been to New York before.
8.On the day when George leaves the village they bring a hammer and chisel and cut a dime into two pieces.
9.They promise to be true to each other, and keep the pieces till they meet again.
10.The reporter sees half a dime hanging on a chain across Tripp’s vest.
11.The reporter gives Tripp a dollar.
12.At last the girl agrees to go home.
13.She takes one half, and George takes the other.
14. Ada says that she is going to marry a farmer next Thursday.
15.The reporter is ashamed when Tripp calls him ‘friend’.
16.Tripp used to live in a village.
17. Ada stops Tripp in the street and asks him where she can find George Brown.
18. Tripp comes to the reporter’s room to tell a story.
19.The reporter is angry with Tripp because he finds no story in Tripp’s story.
20. The reporter feels that he will spend three dollars for Ada.
22. Tripp and the reporter go to the boardinghouse.