Answer:
Nicolaus Copernicus
Explanation:
In 1543, Nicolaus Copernicus detailed his radical theory of the Universe in which the Earth, along with the other planets, rotated around the Sun. His theory took more than a century to become widely accepted.
Answer:
The Fermi energy is 0.568 eV and the conductivity at room temperature is 31.24 (Ωcm)⁻¹
Explanation:
Data given:
Nd = doping concentration = 5x10⁶/cm³
According the mass action law, the hole concentration is:



The conductivity of n-type of semi-conductor is equal to:
The mobility of Germanium is 3900 cm²/Vs
σ = 1.6x10⁻¹⁹ * 5x10¹⁶ * 3900 = 31.24 (Ωcm)⁻¹
Answer:
1/2m or 0.5m
Explanation:
The formula to find the speed of a wave is given by:
V = frequency x wavelength
To find the wavelength, make the wavelength the subject of the formula
Therefore, wavelength = velocity ÷ frequency