The car on the left is moving with a velocity of 3 m/s, and the other two cars are stationary. The moving car collides with the middle car. The two cars couple and continue to move together until they couple with the third car. If the direction of positive motion is to the right, what is the final velocity of the three coupled cars?
O 1.5 m/s

Atoaster oven has a resistive heating element. the average rate at which it dissipates energy as thermal energy is 1.00 \(\rm kw\). in the united states, emf amplitude in household circuits is \(\mathcal e_{\max}\) = 170 \({\rm \; v}\) and the \(\rm ac\) oscillation rate is 60 \(\rm hz\). part a what is the root-mean-square current through the heating element?