Waves from a Radio Station with a Wavelength of 644

question 39

Multiple Choice

Waves from a radio station with a wavelength of 644 m arrive at a home receiver a distance 50 km away from the transmitter by two paths.One is a direct-line path and the second by reflection from a mountain directly behind the receiver.What is the minimum distance between the mountain and receiver such that destructive interference occurs at the location of the listener? Assume no phase change on reflection.

• A)161 m
• B)322 m
• C)483 m
• D)644 m
• E)1290 m

Understand and compare different systems development methodologies.

Understand the key roles and responsibilities in managing an organization's data warehouse.

Learn about the levels of analytics and their application in a business context.

Identify the process and technology used by companies to understand customer preferences and improve product offerings.

---

Definitions:

Selling and Administrative Expenses

Operating expenses related to selling products or services and managing the business, excluding production costs.

Direct Materials

Parts and raw materials of a product.

Variable Overhead

Costs that fluctuate with production levels, such as utilities or materials used in the manufacturing process.

Variable Costing

An accounting method that includes only variable manufacturing costs - direct materials, direct labor, and variable manufacturing overheads - in product costs.