A sheet of red paper will look black when illuminated with

The image below shows numerous volcanic mountains in the pacific northwest. what is the most likely cause of the volcanic and earthquake activity in this region?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects