The figure below shows a planet traveling in a counterclockwise direction on an elliptical path around a star located at one focus of the ellipse. When the planet is at point A,
A. its speed is constant.
B. its speed is increasing.
C. its speed is decreasing.
D. its speed is a maximum.
E. its speed is a minimum.
Answer: B
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If vector = -3.0 - 4.0 , and vector = +3.0 -8.0 , then the magnitude of vector = - is
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