Examlex
Suppose a planet is discovered that revolves around its sun in an elliptical orbit with the sun at one focus. Its perihelion distance (minimum distance from the planet to the sun) is approximately , and its aphelion distance (maximum distance from the planet to the sun) is approximately . Approximate the eccentricity of the planet's orbit. Round to three decimal places.
Measurements
Measurements refer to the size, length, or amount of something, determined through quantitative comparison with a standard unit.
Element
A fundamental or essential constituent of a composite entity; in contexts like chemistry, an element is a substance that cannot be broken down into simpler substances by chemical means.
Variable
A feature or characteristic that can vary among individuals or over time.
Characteristic
A feature or quality belonging typically to an individual, group, or situation, often used to define or distinguish.
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