Why dose free movement and no internal borders pose a problem to security for the EU?

Given that the volume of a cuboid is 180 cm³ and the area of one of its rectangular face 36 cm² what is the height of the cuboid

Because north america is in a it has a variety of biomes and climates. a. high latitude zone c. middle latitude zone b. middle longitude zone d. high longitude zone select the best answer from the choices provided a b c d

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal