again, please limit each question to one or two sections. And do not repeat questions.
already answered all of these in a previous question.
Why can't a person receive the radio frequencies
because there was no evolutionary reason for us to have developed such a capability.
Some people are complaining about receiving voices in the brain? Whay is the kind of device that can do it? No such device is possible.
What's the difference of the very small waves frequencies and the big ones? The wavelength is shorter, which means the frequency is higher. They are related by the equation:
fλ = c
f is frequency in Hz
λ is wavelength in meters
c is speed of light 299,792,458 meters/second
there are many types of radiation, the term is general
light, radio, microwaves, X-rays, UV, IR are all electromagnetic radiation.
high energy particles are also considered radiation, caused by radioactive elements.
Do microwaves produces heat, electricity and radiation?
Microwaves ARE radiation, see above. They produce heat and electricity, yes, in objects they hit.
Is the radiation like those of the bombs? no, see above.
From where come those radiations? which type, there are many.
How to calculate an eletromagnetic field? come back when you have more physics background.
7-Is it possible to learn all the physics alone?
no, the field has become too large.
What is the kind of computer to have to learn physics? A 2GB Ram and 32 GB Rom is ok?
you don't need a computer, but any basic unit is fine for a beginner.
Does the microwave have a magnetic componant?What's the voltage?
yes, all EM radiation has a magnetic componant. It is not measured in volts but in teslas, and the value depends on the frequency and amplitude of the radiation.