Answer:
The second dart leaves the gun two times as faster than the first one.
Explanation:
Assuming no energy loss during the spring-dart energy transfer, we have by the conservation of energy principle
Given an arbitrary 
and its double, 
, launch velocities are
Answer:
The distance traveled!
Explanation:
This is a velocity time graph of an object moving in a straight line due North.
Speed=30 m/s - 1.5 m/s = 28.5 m/s forward
Answer:
continental drift
Explanation:
Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines look like they fit together like a puzzle
