Question

What is meant by radar and sonar? How long distances are messured using these techniques?

Answer 1

Explanation:

Your returning voice is called an echo. Radar and sonar are electronic devices that use the principle of an echo to detect and locate objects. Both radar and sonar locate objects from the echo of a signal that is bounced off the object. Radar uses radio waves, which are a type of electromagnetic energy.

Answer 2

Answer:

monolith is a geological feature consisting of a single massive stone or rock, such as some mountains. Erosion usually exposes the geological formations, which are often made of very hard and solid igneous or metamorphic rock.