A vehicle having mass 40kg has it kinetic energy equal to 200 J. find the velocity with which it moves.

Ineed the answers for these promblems i have

Although longitudinal waves can travel through all media types what is the disadvantage of this type of wave transmission? a) he efficiency of he wave transmission is greatly diminished as the media becomes less dense b) the oscillation of one set of particles has a huge impact on neighboring particles c) particles become too close together as they bump into each other making it more likely to hit other particles down the line

Which of the following is used to answer scientific question? a. intuitionb. opinion pollsc. experimentd. imagination