Julia performs an experiment to measure the wavelength of four different waves and records her data in the table below.
2 answers:
Explanation :
The amplitude of the wave illustrates the energy of the wave. The energy of the depends on the amplitude and the frequency of the wave.
The maximum distance covered by the wave is called its amplitude. The topmost point on the wave is called its crest and the down most point is called its trough (as shown in the attached figure).
From the given data, the wave having the amplitude of 3 cm has the least energy while the wave having an amplitude of 12 cm have maximum energy.
So, the correct order of the wave from the lowest energy to the highest energy is :
1 < 4 < 2 < 3
Hence, this is the required solution.
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Answer:
Explanation:
As the path is straight, so the speed is equivalent to velocity. Now. assuming that the acceleration and deceleration of the train are constant. So, change of velocity with respect to time for acceleration as well as deceleration is constant. Hence, the slope of the speed-time graph is constant for the time of acceleration as well as deceleration. The speed for the time from to
is constant, so slope for this interval of time is zero. The speed-time graph is shown in the figure.
The total distance covered by the train during the entire journey is the area of the speed-time graph.
Area
As velocity is in and time is in
so the unit of area is
Hence, the total distance is .
