Answer:

Explanation:
The velocity of plane relative to earth is given by:
![V_{P/E}=\frac{d}{t}\\V_{P/E}=\frac{[-121i-20j]km}{0.490h} \\V_{P/E}=[-247i-41j]km/h](https://tex.z-dn.net/?f=V_%7BP%2FE%7D%3D%5Cfrac%7Bd%7D%7Bt%7D%5C%5CV_%7BP%2FE%7D%3D%5Cfrac%7B%5B-121i-20j%5Dkm%7D%7B0.490h%7D%20%20%5C%5CV_%7BP%2FE%7D%3D%5B-247i-41j%5Dkm%2Fh)
As the from given data.The velocity of plane relative to air is:
![V_{P/A}=[-210i]km/h](https://tex.z-dn.net/?f=V_%7BP%2FA%7D%3D%5B-210i%5Dkm%2Fh)
According to relative motion of velocity of the air relative to earth given by:
![V_{A/E}=V_{P/E}-V_{P/A} \\V_{A/E}=[(-247i-41j)km/h]-(-210i)km/h\\V_{A/E}=[-37i-41j]km/h\\](https://tex.z-dn.net/?f=V_%7BA%2FE%7D%3DV_%7BP%2FE%7D-V_%7BP%2FA%7D%20%5C%5CV_%7BA%2FE%7D%3D%5B%28-247i-41j%29km%2Fh%5D-%28-210i%29km%2Fh%5C%5CV_%7BA%2FE%7D%3D%5B-37i-41j%5Dkm%2Fh%5C%5C)
The magnitude is given as:

5 m/s
30 divided by 6 is 5
Answer:
3.16 ×
W/
Explanation:
β(dB)=10 × 
=
W/
β=55 dB
Therefore plugging into the equation the values,
55=10
})[/tex]
5.5=
})[/tex]
= 
316227.76×
= I
I= 3.16 ×
W/
KE = 1/2 mv^2 is the relationship betwee mass and kinetic energy