Answer:
1.44%
Explanation:
The potential energy of a spring is given by

The kinetic energy is

Now x = 12 A
Applying in the first equation

The percentage would be 14400%
at
(makes more sense)

The percentage is 25 % of the kinetic energy
Copernicus started a scientific revolution with his theory that, D the Earth revolved around the sun.
Answer:
the soap sinks because it is more dense than the duck.
A pendulum is not a wave.
-- A pendulum doesn't have a 'wavelength'.
-- There's no way to define how many of its "waves" pass a point
every second.
-- Whatever you say is the speed of the pendulum, that speed
can only be true at one or two points in the pendulum's swing,
and it's different everywhere else in the swing.
-- The frequency of a pendulum depends only on the length
of the string from which it hangs.
If you take the given information and try to apply wave motion to it:
Wave speed = (wavelength) x (frequency)
Frequency = (speed) / (wavelength) ,
you would end up with
Frequency = (30 meter/sec) / (0.35 meter) = 85.7 Hz
Have you ever seen anything that could be described as
a pendulum, swinging or even wiggling back and forth
85 times every second ? ! ? That's pretty absurd.
This math is not applicable to the pendulum.