The inner planets are small and rocky and the outer planets are mostly large and gaseous because

The closer a planet is to the Sun, the warmer it would be. Gases move faster the hotter they are and if they are fast enough (escape velocity), they can escape the gravitational field of their planet and spread in the space. Further planets are gaseous because their gases don't have the energy to escape their gravitational pull

Explanation:

credit to person above me

a) cold, dry

explanation:

continental polar masses are cold and dry air masses because the cold air cannot hold much moisture. as they move into warmer air, they can trigger precipitation.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.