During the life of a person is always in range of the electromagnetic field (EMF) of the Earth. This field, called the background has a certain level at each frequency, which is not harmful to human health, and is considered normal. Natural electromagnetic waves with a frequency range covers from a few hundredths and tenths of Hertz to thousands of gigahertz. Power lines, radio transmitters create a strong electromagnetic field, many times higher than the permissible level. To protect the rights were developed health standards (GOST 12.1.006-84 regulates the effects of electromagnetic radiation on humans), including those that prohibit the construction of residential and other facilities close to strong sources of electromagnetic radiation.
Thanks a lot for your letter. I was glad to get it. I’m sorry I didn’t answer earlier but I was really busy with my school.
In your letter you asked me some questions. Well, usually when my parents don’t like how I spend my free time I listen carefully to them. And after that I usually make a decision to do what they want me to do. Yes, I meet my friends pretty often. Generally, we go to the nearest cinema together.
By the way, do you play games with your sister? Do you like to talk with her? Does she play some of her music to you ?
I’ve better go now as I have to do my homework. I’m looking forward to your answer. Keep in touch.
1)forty plus twenty equals sixty 2)fifty-seven plus five equals sixty-one 3)eighteen plus seven equals twenty-five 4)seventy-eight plus fourteen equal to ninety-two 5)nineteen plus eight equals twenty-seven 6)sixty-eight plus fifteen equal to eighty-three 7)plus forty-two and forty-five and eighty-seven equal 8)eighty-three plus seven is equal to ninety 9)eighty-five plus fifteen hundred 10)ninety-nine plus one equals one hundred 11)plus fifty-three hundred and forty-seven equal 12)twenty-seven plus one hundred and seventy-three equals удачи тебе в учёбе!
During the life of a person is always in range of the electromagnetic field (EMF) of the Earth. This field, called the background has a certain level at each frequency, which is not harmful to human health, and is considered normal. Natural electromagnetic waves with a frequency range covers from a few hundredths and tenths of Hertz to thousands of gigahertz.
Power lines, radio transmitters create a strong electromagnetic field, many times higher than the permissible level. To protect the rights were developed health standards (GOST 12.1.006-84 regulates the effects of electromagnetic radiation on humans), including those that prohibit the construction of residential and other facilities close to strong sources of electromagnetic radiation.