Ultrasound

Question 1

Can we hear the ultrasound?

Answer 1

No,

Question 2

How can we calculate a ultra sound, using a equations?

Answer 2

S = V x T
S= distance in metres, m
V= speed in metres per second, m/s
T= time in seconds, s

Question 3

Why do humans use ultrasound?

Answer 3

The principal of ultrasound scans is to check that a foetus is developing normally and to take Measurements of it’s growth.

Question 4

Why are X-rays bad?

Answer 4

X-rays are ionising which means that they damage living tissues and the DNA within the cell.

Question 5

Why are ultrasounds safe?

Answer 5

Ultrasounds are not ionising, and so they are safe to use when performing a foetal scan

Question 6

What are the difference between X-ray and ultra sound?

Answer 6

1. X-rays have a much shorter wavelength, this means they produce higher quality images

Question 7

What is a ultra sound?

Answer 7

Sound with a frequency greater than 20,000Hz (20kHz)

Question 8

Ships use____ _______ to detect objects in deep water and measure water depth.

Answer 8

Echo sounding

Question 9

Ultrasound waves are sound waves of frequency______ _________.

Answer 9

Above 20 000Hz

Question 10

Ultrasound waves are _______ ______ when they meet a boundary between two different substances.
The____ ____ for the reflection to reach a detector can be used to determine how____ ____the boundary is.

Answer 10

1. Partially reflected
2. time taken
3. far away

Question 11

Ultrasound waves to be used for both_____ and _______ imaging e.g pre-natal scans to check the unborn baby.

Answer 11

1. medical

2. industrial