identify FIVE reall like reallyy interesting events/things that you do with regular frequency in your daily life (NO Wrong answer, just has to be interesting)

Phase changes are chemical changes. true or false

A2.00-m long piano wire with a mass per unit length of 12.0 g/m is under a tension of 8.00 kn. what is the frequency of the fundamental mode of vibration of this wire?

Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide?   kg • what must the total momentum of the system be after the train cars collide?   kg •