As we go deeper in Physics, there comes a point when your child needs a tad more than just regular classes and parental engagement. Help your child acquire top-class FREE learning resources for grade 9 Physics learners. This repository can give your child the power to accomplish any obstacle in grade 9 Physics. Generate the capacity in your child to learn, comprehend and retain key Physics concepts.
Navigate through the repository by searching for resources on the basis of subjects and topics. Happy learning to you!
Page No 170: Question 1: What is the audible range of the average human ear?
Answer:
The audible range of an average human ear lies between 20 Hz to 20,000 Hz. Humans cannot hear sounds having frequency less than 20 Hz and greater than 20,000 Hz.
