Radio stations use electromagnetic waves for broadcasting. The chart shows different frequencies of waves used by radio stations
. Which radio station has the wave with the longest wavelength?
2 answers:
Answer: radio station W
Explanation:
The wavelength of a radio wave is given by:
where
c is the speed of light
f is the frequency of the wave
From the equation, we see that the wavelength is inversely proportional to the frequency: the higher the frequency, the shorter the wavelength, the lower the frequency, the longer the wavelength.
Therefore, the waves with longest wavelength are the waves with lower frequency: therefore, the waves emitted by radio station W.
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Answer:
Explanation:
The total force on the particle is given by
Then, by replacing we have:
where the cross product can be made with the determinant method.
Hope this helps!!
To solve this problem we will apply the geometric concepts of displacement according to the description given. Taking into account that there is an initial displacement towards the North and then towards the west, therefore the speed would be:
Travel north 2mph and west to 1mph, then,
The route is done exactly the same to the south and east, so make this route twice, from the definition of speed we have to
Therefore the total travel time for the man is 1.15hour.