Roger walks into a music store Music from a popular song is playing from speakers mounted along the walls of the store. When Roger
walks to the middle of the room, he notices that the music suddenly seems louder to his ear. Which model from above illustrates the
phenomenon Roger is encountering?

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!

Which of these is the best way to manage a natural resource

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?