Echo Sounding: Using Ultrasound to Locate Objects Beneath Water

The video tutorial explains how ships use ultrasound technology, known as sonar or echo sounding, to locate objects beneath the water's surface. It describes the process of emitting an ultrasound pulse from a ship, which travels to the sea floor, reflects back, and is detected by the ship's receiver. The time taken for the echo to return is used to calculate the distance to the sea floor using the formula: distance = speed x time. An example calculation is provided, demonstrating how to determine the ocean's depth. The video also highlights that the ultrasound pulse travels twice the distance between the ship and the sea floor, requiring division by two to find the actual depth. Additionally, sonar can detect fish shoals, shipwrecks, and other underwater objects.

What is the primary purpose of using ultrasound in ships?

• To measure the temperature of the water

• To locate objects beneath the water surface

• To communicate with other ships

• To navigate through storms

What is the process called when ships use ultrasound to find the depth of the sea?

• Infrared

• Radar

• Sonar

• Lidar

How is the distance from the ship to the sea floor calculated using echo sounding?

• By counting the number of echoes

• By using the formula: distance = speed x time

• By measuring the temperature difference

• By observing the color of the water

In the given example, what is the speed of ultrasound in water?

• 1480 meters per second

• 1000 meters per second

• 2000 meters per second

• 500 meters per second

Why is it necessary to divide the total distance traveled by the ultrasound pulse by two?

• To account for the speed of sound

• To correct for measurement errors

• Because the pulse travels to the sea floor and back

• To adjust for water density