When Truman walks across the tile floor in his kitchen, the sound of his shoes is loud and sharp. Which of the following best describes what would happen if he walked over carpet in the same shoes?

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!