Name two major uses of ultrasound.
Sonar.
Ultrasound doppler.
(a) What is meant by the (a) 'pitch' of sound, and (b) 'quality' of sound?
(b) What is ultrasound? State two uses of ultrasound.
Why is ultrasound so useful? Describe two major applications of ultrasound.
(a) What is ultrasound ? What is the difference between ordinary sound and ultrasound ?
(b) Write any three applications (or uses) of ultrasound.
Give two uses of wind energy. Name the major component which is found in natural gas as well as bio-gas?