"John and Jane step onto the dance floor about 20m apart and they feel an attraction to each other. if Johns mass is 70kg and Jane's mass is 50kg assume the attraction is gravity" i have top don ed the force of attraction between them.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

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

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this