Ultrasound

Question 1

Ultrasounds are frequencies above…

Answer 1

20Khz

Question 2

Equations for Distance =

Answer 2

Speed(m/s) X Time(seconds)

Question 3

Types of ultrasound uses:

Answer 3

In hospitals,
Echo-location
Sonar, (Used by boats to detect distance to sea bed from the boat)

Question 4

Types of animals that use ultrasound:

Answer 4

Mice,
Dolphins,
Bats,

Question 5

How do dolphins and bats use ultrasound?

Answer 5

They make ultrasound waves which reflect by things around them and the animal listens for the echoes, this tells them the location of the object which the wave bounced off.

Question 6

How are sonar equipment in boats used?

Answer 6

A loudspeaker on the ship emits a pulse of ultrasound. This spreads out through the water and some of it is reflected by the sea bed. A special microphone on the ship detects the echo.

Question 7

The speed of sound in sea water is 1500 m/s. The sonar equipment on a boat receives an echo 0.01s after the ultrasound pulse was sent out. What is the distance between the boat and the sea bed?

Answer 7

Distance = speed x time = 1500m/s x 0.01s = 15m