Final answer:
SONAR is the method of detecting the presence, position, and direction of motion of distant objects by reflecting a beam of sound waves. Sound waves travel through a medium with the particles vibrating perpendicular to the direction of wave propagation. The speed of sound is affected by the temperature of the medium, with higher temperatures resulting in faster sound travel.
Step-by-step explanation:
The method of detecting the presence, position, and direction of motion of distant objects by reflecting a beam of sound waves is known as SONAR. SONAR is commonly used by ships to determine the depth of the ocean.
When a sound wave travels through a medium, the particles of the medium vibrate perpendicular to the direction of wave propagation. This is true whether the medium is air, water, or a solid.
The temperature of the medium affects the speed of sound. The higher the temperature, the faster the sound travels. This is because higher temperatures cause the particles in the medium to move faster and transmit sound more easily.