Which Concept Was NOT a Part of Kepler's Laws of Planetary

question 91

Multiple Choice

Which concept was NOT a part of Kepler's Laws of Planetary Motion?

• A) All planetary orbits are ellipses.
• B) The square of the planet's period is equal to the cube of its average distance.
• C) A planet must move fastest in its orbit at perihelion.
• D) Epicycles are needed to explain the varying brightnesses of the planets.

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Definitions:

AB Design

A basic experimental design consisting of a control phase (A) followed by a treatment phase (B), used primarily in behavior analysis to assess the effect of a treatment or intervention.

Randomized AB Design

An experimental design involving random assignment to two groups, A (control) and B (treatment), to examine the effect of a variable.

ABAB Design

Another name for Reversal Design, illustrating the sequence of observational and intervention phases: A (baseline) followed by B (intervention), another A (withdrawal of intervention), and final B (re-introduction of intervention).

ABAB Designs

A type of experimental design used in behavioral research involving sequential phases to compare the effect of a variable.