Answer:
The wave speed is 2.8 m.
Explanation:
Wavelength = 1.4 m
frequency, f = 2 Hz
the wave speed is given by
wave speed = wavelength x frequency
wave speed = 1.4 x 2 = 2.8 m
option (D) is correct.
It is definitely letter D. <span>A1 and B1 are like poles, but there is not enough information to tell whether they are north poles or south poles.
A1 and B1 is either both north poles or both south poles. Repulsion of both magnets says it all--like poles always repel while opposite poles always attract. Thus, the best conclusion to this would be choice D.</span>
<span>In order to determine the wavelength, we use the wave equation:
speed = frequency * wavelength
speed of light c = 3 x 10</span>⁸<span> m/s
Frequency f = 104.1 MHz = 1.041 x 10</span>⁸ Hz<span>
c = f</span>λ
λ = c / f
λ = 3 x 10⁸ / 1.041 x 10⁸
λ = 2.88 meters
The wavelength of the waves is 2.88 meters.
