In a two planet system, what happens to the period when velocity is maximized? a. it increases. c. it decreases. b. it remains constant. d. no period can be calculated because the planet can escape the sun's gravitational pull at high velocities.

Answer is B!                                                                               20chars

The us is first  the  u.s. economy  remains the  largest in the world  in terms of nominal  gdp. however, the  u.s. economy  loses its spot as the number one  economy  to china when  measured  in terms of  gdp  based on ppp. in these terms, china's  gdp  is $23.19 trillion exceeds the  u.s. gdp  of $19.42 trillion