Complete Question
The complete question is shown on the first uploaded image
Answer:
The dopant density is ND ≈ 8.135*10¹² cm⁻³
Explanation:
The explanation is shown on the second , third ,fourth and fifth uploaded image
Proton
charge +
electron
charge -
neutron
charge neutral
You would need to ear defenders (I'm assuming these are ear protectors for use with loud sounds) while firing at a gun range. You could use it for loud construction areas.
Dew - small water drops, happens all the time, even to windows.