Period Definition and 997 Threads

Using Newton’s laws, we could show that for some pendulums, the period T is related to the length and free-fall acceleration g by T=2pi(sqrt l/g) Can the term in parentheses be treated as a constant of proportionality?

What is the period of oscillation in the screenshot? http://img296.imageshack.us/img296/5296/image12yt4.gif Period is just the time it takes to travel from one point on the graph to the exact same point again in the same direction. Looking at the graph I would guess somewhere around 2.5...

Hi, I have a question from a lab experiment for an online course. The question states "In a real spring experiment, you wouldn't expect the period predicted by the formula for the period of a harmonic oscillator. What is the reason for this, and the would the actual value be larger or smaller...

Question: A uniform plank of mass m is pivoted at one end. A spring of force constant k is attached to the center of the plank, as shown in the figure. The height of the pivot has been adjusted so that the plank will be in equilibrium when it is horizontally oriented. I_{CM rod} =...

There is a spring with one end attached to a wall and the other end attached to a mass of 1.19 kg. On the other side of the mass is another spring whose other end is attached to another wall. The springs are identical and have a spring constant value of 49.7 N/m. What is the period? I drew...

1)The time period of a dip needle vibrating in the vertical plane in the magnetic meridian is 3 seconds. When the same magnetic needle is made to vibrate in the horizontal plane, the time period of vibration is 3(2)^(1/2). What is the angle of dip of the place? I think in both the cases, it is...

1)A thin rectangular magnet suspended freely has a period of oscillation of 4 seconds. If it is broken into 2 halves (each having half the original length) and one of the pieces is suspended similarly. What is the new period of oscillation? I solved it in the following way: Let E1 and E2 be...

f(x) = \sum_{n=0}^\infty \frac{cos(4^nx)}{3^n} Usually the period T is worked out by doing \frac{2\pi}{w}=\frac{T}{n} where w is the angular frequency and T is the period. n is the function number in the series. But it obviously can't be applied here.

I have this question: You are doing some spring cleaning and decide to clean out your house. You want to make a new window in your wall with which to see nature come to life, so you tie a heavy mass to a short string and attach the string to a beam in your ceiling so it can swing freely like...

hey guys i think its well know the period of a pendulum is 2*pi*root(l/g) which works fine except!... I've written a small program to model how the bob of a pedulum moves, due to the net forces experienced by it, namely the tension in the wire which is the result of the bobs weight and the...

I was asked to find the period of the following function: f(x)= mod(sinx)/cosx + mod(cosx)/sinx Since modulus is defined as sqrt(x*x), mod(sinx)/cosx= (sqrt(1-cosx*cosx))/ cosx = sqrt(1/cosx*cosx -1) //Taking cosx into the square root = sqrt(secx*secx-1) = sqrt(tanx) =...

consider the Doppler shift formula f=f'gamma(1+betacostheta). (1) the measurements of f and f' are associated with the measurement of time intervals, during which, depending on the scenario we follow, beta and theta could change. authors say that using (1) we make the "locality" assmption in...

In Symon's book 'Mechanics', he writes that for a body of mass m and angular momentum L in an orbit that does not intersect itself (i.e. a simple curve), the period of revolution T is related to the area A of the orbit by T=\frac{2Am}{L} Is this exact as he seems to be implying? It seems to me...

If a pendulum is adjusted so that its frequency changes from 10 Hz to 20 Hz, its period will change from n seconds to what? a. n/4 seconds. b. n/2 seconds. c. 2n seconds. d. 4n seconds

Hello can anyone give me any help on this: I am investigating what factors affect the time it takes for a pendulum to make one complete swing?? Me xxx

A simple electric dipole in an external magnetic field performs harmonic motion (for small angles between E and L) due to the moments by the forces acting on the respective charges. Assuming there is no system to dissipate energy that is. The mechanic moment is given by p x E and the energy of...

My question is that going by the definition of time period that is, "the time required to complete one oscillation". Now, if I say the best option for an engineer should be that , the building should not oscillate , am I right? That could happen if the time period of a system is very...

"A physical pendulum consists of a meter stick that is pivoted at a small hole drilled through the stick a distance d from the 50 cm mark. The period of oscillation is 5.27 s. Find d." I know that the period for a physical pendulum is T = 2pi * sqrt (I/mgL). I'm really stuck on how to...

I found the formula for the period of a pendulum: --- T = 2∏√( L / g) T: Time L: Length of Pendulum g: Gravitational Force --- However, I couldn't find information about the units! If somebody could provide me with information regarding this, it'd be greatly appreciated. Thanks :cool:

Ive been trying this problem for awhile now and I seem to not get it. A hand holding a rope moves up and down to create a transverse wave on the rope. The hand completes an oscillation in 2.5s, and the wave travels along the string at 0.8 m/s. The amplitude of the wave is 0.1m. The frequency...

i need some help on this problem: A sonar signal of frequency 1.00x10^6 Hz has a wavelength of 1.50mm in water. a) What is its period in the water? b)What is its period in the air? Can someone guide me through the steps in order to arrive to the solution or explain to me how to solve...

Here's an interesting question inspired by a homework probem (not mine) - what is the orbital period (proper time) for someone in a circular orbit around a black hole as a function of the radius of their orbit (Schwarzschild r-coordinate). By setting the derivative of the effective potential to...

A simple pendulum is 8.00 meters long.(a) What is the period of simple harmonic motion for the pendulum if it is place in a truck that is accelerating horizontally at 2.00 m/s^2There were 2 other questions with accelerating upward and downward in an elevator, and those numbers I either added or...

Does anyone know how to do this problem? I cannot find any examples in my book like it, and I have gotten no where in a full hour. If 3.9x10^-3 of gold is deposited on the negative electrode of an electrolytic cell in a period of 2.67 h, what is the current in the cell during this period...

The passage below is quotted from wikipedia: "The cycle between one maximum elongation and the next lasts 584 days. After these 584 days Venus is visible in a position 72 degrees away from the previous one. Since 5 * 584 = 2920, which is equivalent to 8 * 365 Venus returns to the same point...

I can't get my answer match up with correct answer in the book: i need to find fundamental period of this signal: x(t) = 2 cos(10t + 1) - sin(4t -1) i used formula for cosine Acos(wt + a) = ... that gives two exponentials... so I got pi/10 instead of pi for answer... any help is appreciated

I’m a bit upset. I think we stumbled upon very strong hints / signs of conspiracy in the Global Warming arena. Scary. Up until now, I’ve always disdained hints of conspiracy. After all, the economic law of offer and requirement of fear seemed to be working pretty well. The public wanting fear...

Is this true? (excerpted from http://www.astro.uni-bonn.de/~bertoldi/ub313/" about 2003 UB313) "...Its very elongated orbit takes it up to 97 times farther from the Sun than is the Earth - almost twice as far as the most distant point of Pluto's orbit – so that it takes twice as long as...

How do i do this! I have a long problem with several question parts about waves and I know how to do all of it except the first question is asking me to find velocity which I need frequency for, which I need Period for! Anyone please help Period and time have been a stumper for me all year...

I weigh 200 pounds today on earth, now I go Into an Isolated System (Say, an artificial Satellite) for six months, I eat healthy foods, drink a lot of water and regularly exercize (due to lack of anything else to do :D), so I'll lose weight, and hence mass. 1) Will there be any change in the...

Greetings, I've read that Quarks became confined and able to bind into baryons like protons and neutrons in the Period of ~10*-12seconds -to- ~10*-5seconds. Its been stated that as the average photon's energy in this period (kT) dropped below about 1 GeV, that quarks could finally bind to...

I have already posted in the physics forum but its gone a bit quiet. I've managed to derrive an equation up to this point. I have \frac{g}{L}\theta = \omega^2 \theta_{max} \sin (\omega t - \alpha) and I need to prove that \omega = \sqrt{\frac{g}{L}} . I'm stuped at this one. Thank's in...

I am attempting to derrive the equation for the time period of a simple pendulum, the notes we have been given show some hints to where we should be aiming to get. I have managed to get to \frac{d^2\theta}{dt^2} + \frac{g}{L}\theta = 0 However, the next line should be \theta = \theta_{max}...

1) A long cylindrical rod of radius, r is weighted on one end so that it floats upright in a fluid having a density. It is pushed down a distance x from its equilibrium position and released. Show that the rod will execute simple harmonic motion if the resistive effects of the fluid are...

Hi there I'm having a little trouble doing problems with SHM kinematics. I think its because I have yet to find a good method of solving them. I'll post one and show what I can do. Them I hope somone can help me find a good method to solving it.A 1 kg block oscillates on a spring with k= 20...

Hi, I have this problem: A simple pendulum of length L is suspended from the ceiling of an elevator. The elevator is accelerating upward with acceleration a. What is the period of this pendulum? From logic I know that T=2pi*sqrt(L/(g+a)), but when I try to find it .. I failed. Please...

A .390kg mass is suspended from a spring. A force of 1.00N stretches it an additional 35.0mm. Find the force constant of the spring, the period of the motion which results when the mass is released, the maximum acceleration, and the maximum velocity. Ok so the force constant is F=ky...

Hi, A particle is subjected to a central potential of: V(r) = -k\frac{e^{-\alpha r}}{r} Where k, \alpha are known, positive constants. If we make this problem one-dimensional, the effective potential of the particle is given by: V_{eff}(r) = -k\frac{e^{-\alpha r}}{r} + \frac{l^2}{2 m...

I was designing a circuit to determine frequency of signals using a counter as the main part of the circuit. However, I was just informed that period must also be measured or have the circuit perform one of the other. Are there ICs that are able to determine the period between rising edges? If...

The mass of a star is 1.570 x 10^31 kg and it performs one rotation in 27.70 days. Find its new period (in days) if the diameter suddenly shrinks to 0.550 times its present size. Assume a uniform mass distribution before and after. I used conservation of momentum I \omega_o = I \omega_f I...

Here's the problem: Phobos and Deimos 2 satalites of mars, ahve orbits with average radii of 9380km and 23500km respectivly. The period of Phobos is .319 Earth days. Whats is the period of Demos? I ahve it set up like this: Rp=9380 RD=23500 Pp=.319 Pd=? and i know (Ta\Tb)sq'ed...

Angular Acceleration/ Find angle in period -- PLEASE help! I'm having trouble with part "B" please help. A.)A dentist's drill starts from rest. After 4.95 s of constant angular acceleration, it turns at a rate of 28600 rev/min. Find the drill's angular acceleration. An- swer in units of...

Determining the mass of a holder through a "Period Squared vs. Mass Added" graph? This question is for Physics Lab. The second part of the lab dealt with simple harmonic motion. We weighed a mass holder with spring attached using a pan balance. We then added .2 kg and increased the weight to...

A mass m is attached to a massless rod of length L to make a pendulum. In addition, when the rod is vertical, two relaxed springs with constants k1 and k2 are attached on either side of the mass to walls. What is the period of oscillation. I started by writing the potential energy as a...

After an action potential has passed the localised region enters its refractory period, and during the absolute refractory period a second impulse cannot be conducted regardless of the size of the stimulation. This is because the sodium channels cannot open immediately after closing, why is that?

Suppose there is a planetary system in which a planet with an average distance of 6 AU from the star has an orbital period of 3 years. What is the mass of the star? The answer should be in SOLAR MASSES. I tried to use the formula: P^2 = (4pi^2*a^3)/G(m+M) but it didnt work:( any...

I'm trying to comprehend some old Fortran 77 code. I've run across an a line of code that resembles the following: R(1)=2.*RL(1)*N(1) What does the period in the above code mean?

Hey anyone who can give me a hand. I've been racking my brain over this question my teacher told me to think about for next class. Its not worth any marks or anything but it might impress him. I would rather ask here then google it. Why do we use a 24hrs on our clocks if the rotational period of...

I have a question about how neurons respond to stimuli during the relative refractory period of an action potential. During the relative refractory period, it is relatively more difficult for a neuron to undergo another action potential due to hyperpolarization, but it is possible. In general...

Hi, i have a solution to the following problem but I'm not sure if it's right or not. If you shake one end of a taut rope steadily three times each second, what would be the period of the sinusoidal wave set up in the rope? Me, I thought that since I'm shaking the rope three times a second...