A Ballet Dancer Is Spinning in the Middle of a Horizontal

question 10

Multiple Choice

A ballet dancer is spinning in the middle of a horizontal frictionless stage. Which of the following things could he change by moving parts of his body or his whole body? (There could be more than one correct choice.)

• A) his total kinetic energy
• B) his translational kinetic energy
• C) his rotational kinetic energy
• D) his angular momentum
• E) his moment of inertia
• F) the horizontal component of his linear momentum
• G) the location of his center of mass (or center of gravity)

Differentiate between short-range, medium-range, and long-range forecasting.

Calculate seasonal indices and understand their application in seasonal adjustment.

Understand the role of smoothing constants in exponential smoothing.

Interpret the correlation coefficient and its implications for variable relationships.

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