your average speed is 15 because 3hr times 5 winters is 15 hours
The pitch of the sound of the car will appear to be <span>lower than the pitch of the car next to you</span>
use consevation of linear momentum
- m1v1+m2v2=(M1+M2)V3
- 281(2.82)+209(-1.72)=(209+281)V2
- 792.42-359.48=490v3
- 432.9=490v3
- V3=0.88m/s
At absolute zero, all particle motion stops so it is easy to transfer energy.
