In a given period of time, 12,000 peaks wave A and 15000 peaks of wave B pass through the same medium under the same conditions. The wavelength of wave A is 2m. What is the wavelength of wave B?
A: 1.6 m
B: 0.4 m
C: 2.0 m
D: 2.5 m
The frequency of a wave is determined by the number of peaks that pass through a point in a given period of time. Since the same number of peaks (12,000) pass through for both waves A and B, they have the same frequency.
The formula for the speed of a wave is speed = frequency x wavelength. Since the speed is the same for both waves A and B (since they are passing through the same medium under the same conditions), we can set up the following equation:
frequency x 2m (for wave A) = frequency x wavelength (for wave B)
Simplifying this equation gives:
2m = wavelength (for wave B)
Therefore, the wavelength of wave B is 2m, which corresponds to answer choice C.
Which of the following descriptions is appropriate for a digital image
A: a collection of 1s and 0s
B: only able to be distributed physically
C: analog
D: continuous, rather than discrete
A: a collection of 1s and 0s.
In what circumstances might someone prefer to have paper, rather than digital, financial records?
They will frequently need to share records with others and want to do so easily
They are starting a new business and want to be able to analyze records
Their records will include photographs of checks, which they want to ensure will not degrade over time
They may be more familiar with the paper format after many years
Their records will include photographs of checks, which they want to ensure will not degrade over time.
In what circumstances might someone prefer to have paper, rather than digital, financial records?
A: they will frequently need to share records with others and want to do so easily
B: they are starting a new business and want to be able to analyze records
C: their records will include photographs of checks, which they want to ensure will not degrade over time
D: they may be more familiar with the paper format after many years