Դասարանական և տնային առաջադրանք, երկրաչափություն, 21․11․2022

ա) OB = 4սմ

OD = 10սմ

DC = 25սմ

—————————

AB — ?

<BDC = <DBA \
> ADB = DOC = > AC/AB = DO/OB
<ACD = <CAB / 25/AB = 10/4
25 * 4 = 10 * AB
AB = 25 * 4/10 = 10

ա) <C = 180^o — 90^o — 40^o = 50^o

<C = <C₁

<B = 180^o — 90^o — 50^o = 40^o

<B = <B₁

ABC = A₁B₁C₁

English homework, 24.11.2022

Homework for 25.11.22
NEF Student’s Book Grammar 138 4A a, b
NEF Student’s Book Reading Houses you will never forget/ learn all the unknown words and be ready to speak about the text in class

a. Complete with a word or expression from the list.

1. I must write the date in my diary before I forget it.
2. Let’s wait under the tree until it stops raining.
3. This job is very urgent so please do it as soon as you can.
4. We won’t get a table in the restaurant if we don’t book.
5. I’ll pay you back when I get my first salary.
6. I can’t go unless you pay for my ticket. I’m broke.
7. They’ll be really happy after they hear your news.
8. I want to go on working until I’m 60. They I’ll retire.
9. I must renew my passport before I go to New York.
10. unless you work harder, you won’t pass the final exam.

b. Complete with the present simple or will.

1. Don’t forget to turn off the lights before you leave.
2. Go to bed when the film finishes.
3. They won’t get married until they find a place to live.
4. If I see Emma, I will tell her you are looking for her.
5. I’ll call you as soon as I arrive at the hotel.
6. You won’t be able to park unless you get there early.
7. As soon it stops raining, we will go out.
8. She won’t curry if she doesn’t like spicy food.
9. Don’t write anything until I tell you.
10. When she finds out what he’s done, she will be furious.

Լաբորատոր փորձեր, անօրգանական շղթա

Mg → MgO^օքսիդ → ^H₂OMg(OH)₂^հիմք

Փորձ 1՝ մագնեզիումի օքսիդի ստացումը

2Mg + O₂ = 2MgO + Q

4 տեսակի ռեակցիա է՝ միացման ռեակցիա, ջերմանջատիչ ռեակցիա, օքսիդավերականգման ռեակցիա և այրման ռեակցիա։

Փորձ 2՝ մագնեզիումի հիդրոքսիդի ստացումը

MgO + H₂O → Mg(OH)₂

Փորձ 3՝ փոխանակման, նաև չեզոքացման ռեակցիայով աղի ստացումը

Mg(OH)₂^հիմք + 2HCl^թթու → MgCl₂^աղ + 2H₂O^ջուր + Q