Question

1)Which of the following frequencies can be heared by a normal human being A) 10 4 HZ B)10 5 HZ C)10 6 HZ D)10 7 HZ 2) which are the units ised to measure pressure A) KGm-2 B)pascal C newton Ab both BC Both 31both all of these

Answer 1

20 to 20000 hertz can hear by human being