Giải phương trình

Một đoạn dây đồng dài 40m có tiết diện 1mm2. Biết điện trở suất của đồng là 1,7.10−8Ωm. Điện trở của đoạn dây đó là

V. Read the passage and answer these questions below.

Yesterday when I was riding along a busy street, I saw an accident. A woman was knocked down when she crossed the street at a zebra crossing. Many people stopped to offer their help. A policeman arrived and asked a young man to telephone for an ambulance. While waiting for the ambulance, the policeman and some people tried to stop the bleeding. They used a handkerchief to cover the wound, then put pressure on it and held it tight. They tried to talk to her in order to keep her awake. After about ten minutes, the ambulance arrived and the woman was taken to the hospital.

A. Answer the following questions:

1. When did the accident happen?

2. What did they do to stop the bleeding?

3. What did they try to talk to her for?

Một bàn là điện có ghi 220V - 1200W. Bàn là được sử dụng ở hiệu điện thế 220V. Tính điện năng mà bàn là tiêu thụ trong 1 giờ theo đơn vị J và kWh

SENTENCE TRANSFORMATION :

1.Peter played basketball a lot, but he doesn’t play very often now.
→Peter used

2. It’s quite boring to watch a table tennis match on TV.

→ Watching

3. The calendar is too high for me to reach.

→I am not

4. Walking to school is easy and interesting.

→It’s

5. Swimming in deep rivers is very dangerous.

→It’s