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Radio wave
Radio wave is an electromagnetic wave of a frequency between about 10 4 and 10 11 or 10 12 Hz , as used for long distance communic...
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Radio wave is an electromagnetic wave of a frequency between about 10 4 and 10 11 or 10 12 Hz , as used for long distance communic...
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Hello I am Sohendra rana magar.A student of Jagat mandir school.As you may know year 2020 is a big year for nepal.It is the year of visit n...

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