1)A visitor to a lighthouse wishes to determine the height of the tower. The visitor ties a spool of thread to a small rock to make a simple pendulum, then hangs the pendulum down a spiral staircase in the center of the tower. The period of oscillation is 8.70 s. What is the height of the tower? ___m
2)The speed of a transverse wave on a string is 155 m/s when the string tension is 130 N. To what value must the tension be changed to raise the wave speed to 180 m/s? ___N
1)
here
T = 2 * pie * sqrt(L/g)
8.7 = 2 * 3.14 * sqrt( L / 9.8 )
L = 18.8 m
2)
v = sqrt(T/u) where u is the linear mass density
So u = T/v^2 = 130/155^2 = 5.41 * 10^-3 kg/m
So for v = 180 m/s we have
T = v^2*u = 180^2 * 5.41 * 10^-3 = 175.284 N
1)A visitor to a lighthouse wishes to determine the height of the tower. The visitor ties...
A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower. The period of oscillation is 9.67 s. What is the height of the tower?
A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spiral staircase of the tower. The period of oscillation is 9.18 s. What is the height of the tower?
A visitor to a lighthouse wishes to determine the height of the tower. She ties a spool of thread to a small rock to make a simple pendulum, which she hangs down the center of a spira which she hangs down the center of a spiral staircase of the tower. The period of oscillation is 9.17 s. What is the height of the tower? Submit Answer Tries 0/15
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