A6630 kg train car moving at positive 2.0 m/s bumps into an locks together with one of mass 5400 kg moving at -3.0 m/s. what is the final velocity?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

What are two different ways you could find the value of a? explain these methods.