Uses Of Periscope
It is used in submarines to determine the distance of a torpedo and helps in deciding the right time for the attack.
It is used in a nuclear reactor to observe the chemical reactions that are taking place.
In military periscopes are used to observe from their hiding position. Hi
I believe that the answer would be D, both the speaker and the microphone
Magnesium(?)
<span>2 HCl + Mg ? MgCl2 + H2</span>
A. Sugar... Because the others are mixes of things and combinations. Sugar is pure and on its own.
I hope this helps!