Sound waves in air are

Options

A. transverse
B. longitudinal
C. electromagnetic
D. polarised

Explanation

Here, `m_(1)=1kg,r_(1)=0m`
`m_(2)=2kg,r_(2)=2m`
`m_(3)=3kg,r_(3)=4m`
`m_(4)=4kg,r_(4)=6m`
The moment of inertia of the system about AB axis.
`I=m_(1)r_(1)^(2)+m_(2)r_(2)^(2)+m_(3)r_(3)^(2)+m_(4)r_(4)^(2)`
`=1xx(0)^(2)+2xx(2)^(2)+3xx(4)^(2)+4xx(6)^(2)`
`=0+2xx4+3xx16+4xx36`
`=8+48+144`
`therefore I=200kgm^(2)`