You did 150 joules of work lifting a 120-newton backpack. how high did you lift the bag

Acurve connects the data points that are plotted. (physical science chapter 11 motion)

What is the earliest point in the universe that we can observe? why can’t we see back further than this?

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