Answer:3.49 m/s
Explanation:
Given
Speed of marble at Bottom 
Diameter of loop 
As Energy is conserved therefore Energy at top is equal to energy at bottom

,where
is the velocity at bottom







The Cosmic Ray is a natural way for nuclear fission and nucleosynthesis to occur. It refers to the formation of chemical elements from the impact of cosmic rays on an object.
True because it has "falling" ability
<span>B. It stays the same</span>
Answer:
It be 0,1% - 49.9%
This is because the new moon is 0.0% and the first quarter is 50%.