The Short Lifetime of Muons Created in the Upper Atmosphere

question 70

Multiple Choice

The short lifetime of muons created in the upper atmosphere of the Earth would not allow them to reach the surface of the Earth unless their lifetime increased by time dilation.From the reference system of the muons,the muons can reach the surface of the Earth because

• A)time dilation increases their velocity.
• B)time dilation increases their energy.
• C)length contraction decreases the distance to the Earth.
• D)the relativistic speed of the Earth toward them is added to their velocity.

---

Definitions:

ROA

Return on Assets, a financial ratio indicating how profitable a company is relative to its total assets, assessing efficiency in asset use.

Debt/Equity Ratio

A financial ratio indicating the relative proportion of shareholders' equity and debt used to finance a company's assets.

ROE

The percentage of return on investments that shareholders directly benefit from, calculated by dividing net income by shareholder equity.

Compound Leverage Factor

A measurement used to describe the magnification of risk and return caused by using borrowed money or financial derivatives within an investment.