A Classical Calculation Shows That the Critical Mass Density of the Universe

question 61

Multiple Choice

A classical calculation shows that the critical mass density of the universe is given by where H is the Hubble constant and G is the gravitation constant.If the density is below this value,the universe will expand forever whereas if it is above this value the universe will eventually stop expanding and collapses.Approximately,how many hydrogen atoms per m³ is the critical density equivalent to?

• A)4
• B)40
• C)400
• D)4000
• E)40,000

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Break-Even Point

The point at which total costs equal total revenue, resulting in no profit or loss for the business.

Fixed Costs

Regardless of how much is produced or sold, costs for rent, salaries, and insurance remain unchanged.

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Prices that adjust based on the quantity of products made or sold.

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Income earned by an entity before any taxes have been deducted.