Explanation:
A train moves at a high velocity. Velocity is the rate of motion, speed or action. An example of velocity is a car driving at 75 miles per hour.
A)
Q=606 J
<span> W = 418 J
</span><span> From first law of thermodynamics,
</span><span> [ Uf - Ui ] = Q - W
</span><span> [ Uf - Ui ]=606 -418=188 J
</span><span> [ Uf - Ui ]= 188 J
</span><span>
b )
W2 = 1212 J
</span><span> Q2 = ?
</span><span> Ui2=Uf =Ui +188
</span><span> Uf2=Ui
</span> [ Uf2 - Ui2 ]<span>=Ui-(Ui+188)
</span><span> -188 J
</span><span> Q2=W2+(Uf2 -Uf1)
</span><span> Q2 =1212 -188=1024 J
</span><span> Q added in second step (b) so that internal energy is equal to initial internal energy of step (a)=1024 J</span>
