List of metals along with their work function will be provided to you in exams. Here, possible metal is silver(Ag).
A. In longitudinal waves, particles move perpendicular to the direction the wave is traveling.
The pitch is important because of how low or high or how loud would it be. the frequency of the sound for human ear.
The formula relating acceleration and angular velocity is:
a = ω^2 r
where a is acceleration, ω is angular velocity and r is
radius
But the angular velocity ω is constant all throughout the
disk therefore:
a1 / r1 = a2 / r2
So at points:
<span>r1 = 0.0130 m ->
a1 = 393 m/s^2</span>
<span>r2 = 0.0884 m ->
a2 = ?</span>
393 / 0.0130 = a2 / 0.0884
<span>a2 = 2,672.4 m/s^2</span>