An Eclipsing Binary System Consists of

question 63

Multiple Choice

An eclipsing binary system consists of

• A) a star that is periodically eclipsed by the Moon.
• B) two stars that periodically eclipse each other, as seen from Earth.
• C) two stars in which spectral lines move back and forth periodically due to Doppler shift, indicating mutually orbiting stars.
• D) two mutually orbiting and gravitationally bound stars that are close enough to be resolved when viewed from Earth.

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Definitions:

Revenue Formulas

Mathematical expressions or models used to calculate a company's earnings from its operations over a period.

Planning Budget

A forecast of income and expenditure over a specified future period, used to guide the financial direction of a business.

Budgeting

The process of creating a plan to allocate resources (revenue and expenses) for a specific period, typically used for financial planning and control.

Activity Variances

Differences between the planned or budgeted amounts of costs and revenues and the actual amounts incurred, driven by variations in business activities.