The Scorpius-Centaurus OB Association Is Predicted to Have Produced a Supernova

question 16

Multiple Choice

The Scorpius-Centaurus OB association is predicted to have produced a supernova about 2 million years ago. What led to this prediction?

• A) A supernova remnant with the appropriate location and age was found.
• B) O and B stars are massive stars, many of them over 25 solar masses, and they would create a supernova.
• C) In a close association, collisions between stars are expected, and collisions would raise the mass to the supernova range.
• D) Shock waves from the direction of Scorpius-Centaurus still pass by Earth at frequent intervals.

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Marginal Cost

The added cost faced when one additional unit of a product or service is produced.

Average Total Cost

The total cost of production divided by the quantity of output produced; it includes both fixed and variable costs.

Average Total Cost

The total cost of production divided by the number of units produced, encompassing both fixed and variable costs.

Total Variable Costs

The sum of expenses that vary directly with the level of production or sales volume.