The dicoverer of radioactivity was in 1896 henri Becquerel was using naturally flurorescent minerals to study been discover in 1895 bu Wilhelm Roentgen.
Answer: A confederation is a union of sovereign states, united for purposes of common action often in relation to other states.
Explanation:
Confederalism represents a main form of inter-governmentalism, this being defined as any form of interaction between states which takes place on the basis of sovereign independence or government.
Explanation:
u=0, g=9.8m/s², h=1.2m, v= ?.
from the formula => v²-u²=2gh
=> v²=2×9.8×1.2
=> v = √23.52
=> v = 4.84 m/s .
therefore, with 4.84 m/s the ball will hit the ground.
hope this helps you.