Предмет: Физика, автор: buzurg1996

Два шарика одинаковой массы и одинаковыми радиусами движутся с одинаковыми скоростями центров масс по горизонтальной поверхности. Первое катится, второе скользит. При ударе о стенку тела останавливаются. Определите, у какого тела и во сколько раз больше выделится тепла при ударе.

Ответы

Автор ответа: Бугага123
8
Вроде так. При ударе кин. энергия преобр-ся в тепло. Поэтому найдем ее для каждого шара, а затем и их отношение друг к другу. Но я в этом не уверен)
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task 1. Read the script of the dialogue then find the sentencess with Present Perfect and taking turns write them under the relevant headings.
Dialogue
A: Good evening, Mrs Polmeth. It's raining outside. I've left my umbrella at home. Can I wait for the rain to stop?
B: Sure. Come in. Glad to see you. You have missed a few extra curricular classes this week. Where have you been?
A: Oh, I've been very busy this week getting ready for my mother's birthday party.
B: When did you celebrate it?
A: On the 5th. I've always wanted to make something nice for her on her birthday. I was really tired afterwards, but my mother was very happy.
B: What did you do for her on that special day?
A: It took me some time to think it over. I asked my friends to help me.
B: I know you have a lot of friends and you always help each other, don't you?
A: Yeah, you're right. At first we wrote and sent the invitations to our guests, then the boys started making decoratins for the paty.
B: What about the girls, what did they do to help you?
A: They tired to find the unusual recipes. We wanted to cook something special, something really tasty. It was difficult to find unque, you know.
B: Why? You can always find something interesting on the Internet. Did you use it?
A: Of course we did.
B: Did you find anything?
A: Yes, we did. I can share some of the recipes we found with you if you like.
B: It would be very nice of you. Thanks.
A: Not at all.
B: By the way, what present did you give your mother after all?
A: I presented her with a box full of colorful butterflies.
B: Really? Oh, it's a magic present. She is sure to remember it.
A: My friends think so too. Oh, look the rain has stopped. Sorry, Mrs. Polmeth, I have to run. See you soon. And I promise to bring you the recipes.
B: All right. Good bye, Kate. Remember me to you mom.
A: Ok, I will.
Предмет: Английский язык, автор: bilosorochkainna
Put the verbs in brackets into the Present Simple.
a. Unlike the police in most of the world, British police … (not to carry) guns.
b. The ordinary policemen still … (to wear) helmets though officers … (to have) caps, but the popularity of the police with general public has declined.
c. Surveys … (to show) that people … (to prefer) this kind of policing, even if it … (not to catch) so many serious criminals.
d. This problem … (to concern) the conduct of all our courts.
e. Magistrates are volunteers who … (to work) at other jobs and … (to sit) in the courts for, say, two days.
f. Nevertheless more thefts, more violence, more vandalism, more fraud … (to exist) than did the years ago.
g. Also some crime … (to become) suddenly fashionable.
h. Not anybody … (to know) whether it really happened rarely or whether people who had been robbed hesitated to come to the police station.
i. It is generally considered to be an activity which … (to make) money for lawyers rather than anything else.
j. On the other hand, the British unlike the Americans … (not to spend) their time suing each other.
k. It … (to decide) how you may distribute your goods when you die, … (to impose) limits on how fast you may drive your car, … (to say) what breeds of dogs you may own.
l. Ministers … (to change) their minds, of course, about emergency regulations. It … (not to affect) law.
m. Secondly, it … (to stop) “law by decree” in which someone with power, either political or administrative … (to claim) that this or that is a good idea and should therefore be enacted.
n. When Parliament … (to pass) a new law, it has to be examined very carefully to make sure that it … (not to contradict) previous law unless there is full and clear intention to do so.
o. The law … (to set out) the arrangements for marriage, divorce and custody of the children of divorced couples.
p. Often we … (to feel) irritated or embittered by obvious stupidities in the law which … (not to take) proper account of a modern situation.