Which question is testable? a. how does changing the amount of water affect the growth of corn? b. is it ethical to use human tissue removed during surgery for scientific research? c. are you happy with your new job? d. will people be disappointed if car insurance rates increase?

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.