An object is moving with constant velocity. which of the following statements is true?

a) the net force on the object is zero.
b) a constant force is being applied in the direction of motion.
c) there are no forces acting on the object.
d) there is no frictional force acting on the object.

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