They have a north and South Pole .The opposite poles attract to each other ,the same poles repel from each other.
Answer: Katherine Johnson's knowledge of (mathematics) was instrumental in the return of the Apollo astronauts from the Moon to Earth.
It desolves calcium carbonate causing plates to bend and faults to occur. Faults and plates moving cases the formation of caves.
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Answer:

Explanation:
From the Question We are told that
Initial Force 
Final Force 
Distance between the front and rear wheels \triangle x=3.20 m
Since

Therefore


Generally the equation for The center of mass is at x_2 is mathematically
given by



