Sonar system is a technique that uses sound propagation for underwater activities.Sonar<span> is simply making use of an echo. When an animal or machine makes a noise, it sends sound waves into the environment around it. Those waves bounce off nearby objects, and some of them reflect back to the object that made the noise.</span>
1: to do work faster.
2: to save the precious time.
3: to save labours
Answer:
A. Potassium
B. Potassium
C. Bromine
D. Bromine and Krypton potassium
E. Barium
F. Arsenic and Geranium
G.
Explanation:
The two things that must exist for an electric current to be produced are:
An electric potential between two bodies and a conducting path joining the bodies.
This comes from the fact that when there is a potential difference there is an electrical field and hence a force that makes some free charges to move in the conductor. For this reason, there's an electrical current.
B: 1 trillion distributed across the universe. If I remember correctly.
