In Their Post-Main-Sequence Stages of Evolution High-Mass Stars Spend Progressively

question 60

Multiple Choice

In their post-main-sequence stages of evolution high-mass stars spend progressively shorter periods in each stage, in part because

• A) they are losing energy faster as neutrino cooling becomes more important.
• B) stellar cores become permanently inert once the stars leaves the main sequence.
• C) the stars switch from fusion to fission to produce energy.
• D) massive stars lose most of their nuclear fuel through powerful stellar winds.
• E) the energy is now produced only via violent gravitational contractions.

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Definitions:

Accounting Rate of Return

A financial ratio that measures the expected profitability of an investment, calculated as the average annual profit divided by the initial investment.

Cash Flows

The movement of money into and out of a business, used to assess the company's liquidity, financial health, and profitability over time.

Net Income

The total profit of a company after all expenses, including taxes and interest, have been deducted from total revenue; also known as net earnings or net profit.

Net Present Value

A method used in capital budgeting to evaluate the profitability of an investment by calculating the difference between the present value of cash inflows and outflows.