41 Nb Co
co se
O
Niobium and
Cobalt are in the
same period.
92.906
58.933
44.956
O
How are the three elements above
organized on the periodic table?
Cobalt and
Scandium are in
the same period.
Cobalt and
Scandium are in
the same group.
O
Niobium and
Cobalt are in the
same group.

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

How many atoms of nitrogen are in the chemical formula ni(w on

According to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does maria's voyage take according to samir?