Two Radio Antennas Are 10 Km Apart on a North-South

question 4

Multiple Choice

Two radio antennas are 10 km apart on a north-south axis on a seacoast.The antennas broadcast identical AM radio signals,in phase,at a frequency of 4.70 MHz.A steamship,200 km offshore,travels due north at a speed of 15 km/hr and passes east of the antennas.A radio on board the ship is tuned to the broadcast frequency.The reception of the radio signal on the ship is a maximum at a given instant.The time interval until the next occurrence of maximum reception is closest to:

• A)5.1 min
• B)3.8 min
• C)6.4 min
• D)7.7 min
• E)8.9 min

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Definitions:

Source of E-Evidence

Origin or provider of digital data or electronic records that can be used as evidence in legal proceedings or investigations.

Metadata

Embedded electronic data recorded by a computer in association with a particular file, including location path, creator, date created, date last accessed, hidden notes, earlier versions, passwords, and formatting. Metadata reveals information about how, when, and by whom a document was created, accessed, modified, and transmitted.

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Chain of Custody

The chronological documentation or paper trail that records the sequence of custody, control, transfer, analysis, and disposition of physical or electronic evidence.