A 340 g air track cart traveling at 1.25 ms collides, Ask an Expert

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Q. A 340 g air track cart traveling at 1.25 m/s collides elastically with a 300 g cart traveling in the opposite direction at 1.33 m/s. What is the speed of the 300 g cart after collision?

Q. A 120 ohm resistor a 60 ohm resistor and a 40 ohm resistor are connected in a parallel to a 120 volt power source. what is the current running through the entire circut?

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