Ultrasound

Question 1

What is ultrasound

Answer 1

Sound with frequencies over 20kHz

Question 2

How are ultrasound created

Answer 2

Devices emit electrical oscillations with a range of frequencies that are converted to mechanical vibrations to produce sound waves beyond the human auditary range

Question 3

Uses of ultrasound

Answer 3

Pregnancy scans (sound waves travel through the body but whenever they meet the boundary of two mediums , like fluid in the womb, the wave is reflected back)
Industrial imaging (Find flaws in objects like pipes or materials like wood)

Question 4

Earthquakes

Answer 4

When there is an earthquake it produces seismic waves which travel through the earth and are recorded using a seismometer

Question 5

P-Waves

Answer 5

Longitudinal waves that travel through solids and liquids
Travel faster than S-Waves

Question 6

S-Waves

Answer 6

Transverse waves that can’t travel through liquids or gases
Slower than P-waves