Предмет: Физика, автор: Helloqwe

лампочка имеет мощность 60 вольт и работает при рабочей напряжении 120 Вт. Чему равен ток проходящий через лампочку?

Ответы

Автор ответа: dfkth
0
Мощность это Ватты
Напряжение Вольты
P=U*I       I=P/U       I=60/120=0.5 A
Автор ответа: MashaPutnaj
0
дано  P=60Вт    U=120В     I- ?

I=P/U=0,5 А
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Предмет: Английский язык, автор: jonchannel
Употребите глаголы в форме Present Perfect
Задание 1
(Present Perfect Continuous) или Past Indefinite.
1
1. Mr. Jones ....................... (not, to speak) to me since he ...................... (to return) from his trip.
2. Mr. Jones ....................... (to speak) to me when he ......................... (to return) from his trip.
3. She ......................... (to cook) for the company for about two years. Everybody thinks her dinners
are wonderful.
4. She ......................... (to cook) for the company for about two years. Then she .........................
(to have) a baby and ......................... (to leave) the job.
5. I ......................... (already, to buy) everything necessary for the party.
6. I ......................... (already, to buy) everything necessary for the party on the way home.
7. I ......................... (to know) this poem for a long time.
8. I ......................... (to know) this poem long ago. But I can’t remember it now.
9. When ......................... (you, to send) him the letter?
10. Since when ......................... (you, to send) him letters?


Задание 2
Раскройте скобки, употребляя глагол в форме
Past Continuous или Past Indefinite.
1. He ......................... (to hurt) his leg when he ......................... (to fall) off the ladder.
2. I .............. (to see) that she ................. (to enjoy) the concert. She ................ (to sit, to smile).
3. Why .......................... (you, not, to open) the door at once? — Sorry, I ......................... (not,
to hear) the bell.
4. I ......................... (to break) the plate while I ......................... (to do) the washing-up.
5. At two o’clock this afternoon I ......................... (to have) lunch that’s why you .........................
(not, to get) me on the phone. What ............................... (you, to want) to tell me? — Actually
I ......................... (to call) to tell you I ......................... (to come) by the 7 o’clock train.
6. I .......................... (to find) that old photo when I .......................... (to look) through the album.
7. He ................. (to look) through the article for some time and then ................. (to make) notes.
8. They ......................... (to discuss) the situation for about an hour at yesterday’s meeting.
9. The boy ........................ (always, to fidget)! But whenever I ........................ (to tell) him not to,
he ......................... (to stick) out his tongue at me.
10. While the Coppards ............................ (to work) in the garden Mr. Coppar