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اخواني الكرام اسعد الله مسائكم بكل خير

اخواني لدي ثلاثة اسئله في الاكترو داينمك اتمنا ممن لديه القدره على حلها ان يفيدنا او يدلنا على مكان نجد فيه فائده

Suppose you embedded some free charge in a piece of glass About how long would it take for the charge to flow to the surface?

2) Suppose you were designing a microwave experiment to operate at frequency 1010 Hz. How thick you would make silver coating?

3) Find the wavelength and propagation speed in Cu for radio waves at 1 MHz. Compare the corresponding values in air

ولكم منى جزيل الشكر والعرفان.