If we double only the mass of a vibrating ideal mass-and-spring system, the mechanical energy of the system.

2(4p+1)/5< = (3+12p)/4 its less than or equal solve it for me an with explanation plz

Which is an advantage to using nonrenewable resources? a. they can be cheaper. b.they can have a lower impact on the environment. c.they can be used up rapidly. d.they can contribute to global warming.

Ppcc assigned a story board on eg.ppcc.edu about a post-apocalyptic world called the books of wisdom. i was wondering if anyone had any advice on how to do well. also is there a way to change you name?