Which of these chemical formulas is balanced?

Which type of basaltic lava flow has a fairly smooth

Select all the correct answers. which three statements about electromagnetic radiation are true?

Objects a and b are visible in the night sky. six months later they are still visible, but object b shows less parallax than object a. which object is closer? a. a b. b c. you would need to wait another six months in order to figure this out. d. you would need to know the objects' angular diameters in order to figure this out.