Is the Carlsbad cavern a chemical change or a physical

Why does the united states constitution require that a national census be taken every ten years?

Astudent receives a pell grant based on the_.a.satb.nasac.fafsad.act

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities? it's b