In the Drake Equation for Estimating the Possible Number of Technically

question 49

Multiple Choice

In the Drake equation for estimating the possible number of technically advanced civilizations in the Milky Way Galaxy,why does the factor for the rate at which solar-type stars form in a galaxy exclude massive stars with masses greater than about 1.5 times that of the Sun?

• A) Such stars have much shorter lifetimes than it took for intelligent life to develop on Earth and hence should probably not be considered.
• B) Such stars never develop a nuclear furnace in their interiors and hence can never heat any planet sufficiently to sustain life.
• C) Such stars would never develop nuclear processes that could produce heavy elements (e.g., iron) needed for planetary formation.
• D) Such stars are prone to repeated and violent supernova explosions throughout their lives, which would destroy any developing life-forms.

Recognize the significance of cultural context in psychological perspectives.

Explain the importance of social and environmental factors in shaping individual behavior and thought processes.

Understand the basic principles of time value of money and interest compounding.

Calculate the future value and present value of lump sums and annuities.

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Definitions:

Fixed Costs

Expenses that remain constant for a business regardless of the level of production or sales volume.

Break-even Sales

The amount of revenue needed to cover a business's total fixed and variable costs, marking the point at which a business neither makes a profit nor a loss.

Unit Variable Cost

The cost associated with producing one additional unit of a product, varying with the volume of production.

Wage Contract

An agreement between an employer and an employee that stipulates the terms of employment, including pay rate and job responsibilities.