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An observer on Earth observes a star performing simple harmonic motion as it moves periodically from point A to point B then back to point A. She determines that it takes 18 days for the star to move from A to B. What is the frequency of the star's oscillation? Give your answer in uHz, correct to two significant figures.

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A 65kg bungee jumper steps off a bridge with a light bungee cordtied to her and to the bridge. The unstretched length of the cordis 11m. The jumper reaches the bottom of her motion 36m below thebrigde before bouncing back. Her motion can be separated into an11m free fall and a 25m section of simple harmonic motion.
a)For the free-fall part, what is the appropriate analysis model todescribe her motion?
b) For what time interval is she in free fall?
c) For the simple harmonic oscillation part of the plunge, is thesystem of the bungee jumper, the spring, and the Earth isolated ornon-isolated?
d) From your response in part (c) find the spring constant of thebungee cord.
e)What is the location of the equilibrium point where the springforce balances the gravitational force exerted on the jumper.
f) What is the angular frequency of the oscillation?
g) What time interval is required for the cord to stretch by 25.0m?
h)What is the total time interval for the entire 36.0 m trip?

A 65.0-kg bungee jumper steps off a bridge with a light bungee cord tied to her body and to the bridge. The outstretched length of the cord is 11.0 m. The jumper reaches the bottom of her motion 36.0 m below the bridge before bouncing back. We wish to find the time interval between her leaving the bridge and her arriving at the bottom of her motion. Her overall motion can be separated into an 11.0-m free fall and a 25.0-m section of simple harmonic motion. (a) For the free-fall part, what is the appropriate analysis model for her motion? (b) For what time interval is she in free fall? c) For simple harmonic oscillation part of the plunge, is the system of the bungee jumper, the spring, and the Earth isolated or non-isolated? (d) From your response in part (c), find the spring constant of the bungee cord. (e) What is the location of the equilibrium point where the spring force balances the gravitational force exerted on the jumper? (f) What is the angular frequency of the oscillation? (g) What time interval is required for the cord to stretch by 25.0 m? (h) What is the total time interval for the entire 36.0-m drop?  

P2) A uniformly charged sphere of radius R has an electricfield
3
E r
R
= for r < R.
Consider a very simplified model of the atom where the positivenucleus, consisting of Z
protons, is a point charge at the center of the atom, surrounded bya uniform cloud of Z
electrons.
(a) If the nucleus is displaced relative to the electron cloud by asmall distance x, what is
the force acting on the nucleus due to the cloud (and equivalently,the force acting on the
cloud due to the nucleus)?
(b) In PHYS 132 you will have seen simple harmonic oscillators,such as a mass on a
spring. It can be shown that if the acceleration a of an object isdirectly proportional to
its displacement x from a point of equilibrium, then the objectwill undergo simple
harmonic motion with a frequency:
2
f ?
p
= , where 2
a x
?
=-
Determine the frequency of oscillation if the nucleus is displacedrelative to the center of
the electron cloud and then let go. Hint: from knowing the massesof the protons and
electrons, is it the cloud that primarily moves back and forth oris it the nucleus?
Calculate this frequency for a hydrogen atom; you can find theatomic radius R on
Wikipedia. If this oscillating atom emits an electromagnetic waveat the same frequency,
what is its wavelength?

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