8.) A freight train moves with a velocity of 17 m/s to the north. The mass of the train is 6 million kg. What would have to be the velocity of a 2000 kg car if the car were to have the same
momentum?
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Awheelhas a radius of 4.8 m. howfar (path length) does a point on the circumference travel if thewheel is rotated through angles of 30°, 30 rad, and 30 rev,respectively?

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.