sound

Question 1

formation of sound

Answer 1

vibrating object causes the surrounding particles to be disturbed and displaced which in turn causes other surrounding particles to be disturbed and displaced as well. This causes a series of alternate compressions and rarefactions to travel through the medium, leading to the formation of a sound wave which travels in a direction parallel to vibration of the particles.

Question 2

compression

Answer 2

region where air pressure is higher than the surrounding air pressure

Question 3

rarefaction

Answer 3

region where the air pressure is lower than the surrounding air pressure

Question 4

echo

Answer 4

repetition of sound due to reflection of sound

Question 5

ultrasound

Answer 5

sound with very high frequencies which are above the upper limit of the human audibility range which is above 20000Hz