M A 3.0 kg model train going right at 2.8 bumps into another 2.0 kg model train car moving in the same
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m
direction at 1.6 . The heavier train car has a final speed of 2.2 to the right.
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What is the final speed of the lighter 2.0 kg train car?

Will you chech and finish these for me, because i am stumped with them.

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.