The Intensity of the Waves from a Point Source at a Distance

question 56

Multiple Choice

The intensity of the waves from a point source at a distance d from the source is I.What is the intensity at a distance 2d from the source?

• A)4I
• B)2I
• C)I/2
• D)I/4
• E)I/ \(\sqrt { 2 }\)

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Definitions:

Account

A record summarizing the financial transactions related to a particular aspect of a business's financial activities.

Compounded Annually

A method of calculating interest where the interest earned each year is added to the principal, so that the balance doesn't merely grow, it grows at an increasing rate.

Savings Account

A bank account where money can be deposited to earn interest over time.

Deposited

The act of placing money into a financial institution or account for safekeeping or to earn interest.