Consider this row in the periodic table of elements. As we move from left to right, across the row, the elements

A) change from nonmetals to metals.
B) change from metals to nonmetals.
C) start as gases but end as solids.
D) show a decrease in atomic mass number.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?