Period Definition and 997 Threads

I have doubts concerning this problem. Consider f:R-->R a continuous non-periodic function, and the function b(x) = cos(f(x)). Is b(x) periodic, if so, with what period? I got... b(x) is periodic of period L \Leftrightarrow b(x) = b(x+L) \Leftrightarrow cos(f(x)) = cos(f(x+L))...

Trig Functions 2y - 5 = \sin(144t - 45) How can I find when the object is at equilibrum? I know it's when y = 0, but how do I solve from there? I tried arcsine but it gives me a domain error. How can I find the minimum in between [itex]0 \le t \le 10[/tex]? Is the period of oscillation...

Last year I completed two courses in the space of one, so this year I may have the possibility of having a free period. I was just wondering if having a free period looks bad to universities even if I have all my credits.

A particle follows SHM with its eqn.of motion being s(x,y)=Asinwt i + 3Asin3wt j What is its time period? Also find the expression for total mechanical energy wrt time. I tried it in the following way V=Awcoswt i + 3Awcos3wt j = Aw[(coswt)^2 +9(cos3wt)^2]^(1/2)...

Hi. I am currently working on a problem involving a ball being dropped from a hieght of 4m making a perfectly elastic collision with the ground. Assuming no mechanical energy is lost due to air resistance, I must find the period of the motion. I used the equation V(final) = V(initial) - gt...

Suppose that the function T has period 7 and that T(0)=3. Explain why T(-30)=T(40)? Is it normal that teacher just tells you to read stuff in book and then do your homework, without explaining it? She was "teaching" some stupid stuff about graphing f(x)=(x-1)^2 + 2, which they teach you...

this is the expression ofr the orbital period T= 2*pi*R^(3/2)/sqrt(G*M) that i found now the next question asks me to find an expression for T^2=?

:cry: Let' say you have a wave plotted out on a time scale. Each increment on the line is 675 ms. There are 5 increments between each wavelength. How would I find the frequency so that I can solve for the wave's period using: Period = 1/Hz

confused! about period of pendulum hey guys, i have a question. "A meter stick oscillates back and forth about a pivot point at one of its ends. Is the period of a simple pendulum of length 1m greater than, less than or the same as the period of the meter stick?" i thought that the period...

The absolute refractory period: is there any reason for this period (the cause)?

Hi I'm attempting this question and I'm wondering if this is the correct way of going about it or if I'm completely off track: For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of Italian ham. The slices of ham are weighed on...

Bob estimates he can afford a monthly mortgage payment of $575. Current interest rates are 6.75%. Calculate the mortagage hecould assume for each amortization period. A) 15 years the extra info is that the monthly payments per $1000 for this percentage + 15years is $8.85. How would you do...

Hi, I have a couple of questions here I am having a little bit of difficulty with. 1) What is the wavelength of an X-ray that has a period of 1.30x10e-10s? 2) A certian EMR has a wavelength of 2.14x10e-5m in air. What is the wavelength is water(n = 1.33)? I am not looking for the...

We are talking about SHO in physics and the forumula for period T of a pendulum was introduced - T=2*pi*(L/g)^.5 where L is the length of the pendulum arm/string and g is acceleration due to gravity. the instructor also said this was an approximation that was only accurate for small angles...

Consider a satellite, mass=85 kg, in a circular orbit about Earth. Calculate the period of the satellite given a radius r of its orbit of 2.04 x 10^7 m. I used T^2= (4pi^2/ GM)r^3 Plugging in G= 6.67 x 10^-11 M= 85 kg r= 2.04 x 10^7 and solving for T gave...

hey, i have to do an experiment about length of spring and its period, found the relationship, the period is proportional to the square root of the string length. (looks like a pendelum) but i don't understant why when u increase the length, the period increases! tell me y please! urgent...

A homogenous disc of radius r = 0.20m can oscillate as a physical pendulum around a horizontal acxis O located 0.10 m from teh center of the mass of the disc. The disc is perpendicular to O. Find the period of oscillations of the disc. And graivity is 9.8 m/s^2 Is this anything like a...

what happens to the maximum velocity if you double both Amplitude and period of a SHM? the equation is x(t) = A cos (wt + f) v(t) = -A w sin (wt + f) f is phase constant, w = angular velocity i know if i double A and T, the first part of the v(t) equation will be like: -2A *...

Hi Here is a problem I need some help with: Find the time period of a simple pendulum (length l, mass m) when it is attached to the roof of a car moving in a circle with constant speed v and radius r. Here is what I did: IF the angle made by the string (inextensible) with the...

I was curious as to how to approach this problem... An old phonograph record is spinning at 77.6 rpm. The phonograph needle is stuck 7.4 cm from the spindle. a) What is the angular velocity of the record? b) What is the speed of the record below the needle? c) What is the period corresponding to...

Hello everyone Can anybody could please help me in the pendulums? i just wanted to know how a simple pendulum executes simple harmonic motion and what are the factors that could affect the time period of a simple pendulum

Ron and Lynda are purchasing a new home. They will need to borrow $90 000 for the home. The amortization period which best fits their financial situation is 25 years, Discuss why this might be so? I have no idea why? They don't give enough information only what Ron and Lyda are borrowing...

In the figure the blue planet has a period of 1 year and an average distance from the sun of 1.73 x 1011 meters. If the average distance from the sun for the red planet is 1.39 x 1011 meters, what is its period to the nearest hundredth of a year? So I thought maybe they through in the...

Given: G = 6.67259 x 10^11 N x m^2/kg^2 A small Moon of a planet has an orbital period of 1.86 days and an orbital radius of 485000 km. What is the mass of the planet?

Hi Does someone know where I can get access to the following article on the internet without paying for it? "The Period of F = -kx^{n} Harmonic Motion" by Chris Hirata and David Thiessen, The Physics Teacher, December 1995, page 563 Additionally if you are aware of textbooks/internet...

A hypothetical spherical planet consists entirely of iron. What is the period of a satellite that orbits this planet just above its surface? Im stumped :/ density of iron is 7860 kg/m^3

I need to find the orbital radius of a satilite, while only knowing its orbital period. i tried.. a = 4π²r/T² Fnet = Fg a = Gm/r² Gm/r² = 4π²r/T² r = cuberoot(T²Gm/4π²) didnt work out..

Hello. I am having trouble understand the varying mass's effect on the period of a conical pendulum. Well, I understand that there is no effect. However, I am having trouble verifying that in a centripetal force equation for circular motion. Most generally, conical pendulum's centripetal...

Why is the formula for period of simple harmonic motion independent of amplitude?

What is the period of a satellite circling the Moon at a height of 90km above the Moon's surface? Can someone get me started please?

Could someone help me start this problem. My mind it in the angular momentum mode and I am having trouble seeing where to start on this one. :confused: The sun's radius is 6.96E8m and it rotates with a period of 25.3d. Estimate the new period of rotation of the sun if it collapses with no...

How do you find an orbital radius of an object around Earth with its mass and Orbital Period?

I have some problems with the following question: Deduce what terms may arise from the ground state configurations of the atoms of elements of Period 2 and suggest the order of their energies using Hund´s rules. Deduce what terms may arise... Do they mean to which terms the atoms can be...

A small mass m is attached to a point O by an inextensible string of length a. The mass is held with the string taut, at the same level as O, and released. Determine the angular velocity of the mass when the string makes an angle \thetawith the downwards vertical. From this relationship...

A weight hanging on a vertical spring is set in motion with a downward velocity of 6 cm/sec from its equilibrium position. Assume that the constant w for this particular spring and weight combination is 2. Write the formula that gives the location of the weight in centimeters as a function of...

Hello, it's me again. Yes Physics is most of my life right now. :-p Here's one I'm not sure how to complete. Any hints/tips would be well appreciated. Thank You! An object executing simple harmonic motion has a maximum speed v(max) and a maximum acceleration a(max). Find (a) the...

Guys and gals, What is the real deal with safe sex and timing it so there is the least chance of pregnancy? I've asked so many people.. So many different ideas. The most common one, that my physiology teacher agrees with, is that one week after the girls period ends is the most dangerous...

T = 2*pi * Sqrt 1/g Is this the proper formula for finding the period of a pendulm? The length = 0.9 meters g= 9.8m/s^2 I come up with 1.90s.. am I going in right direction?

A hollow spere, radius 0.20m is attached to the end of a 0.80m long string, hung vertically and used as a simple pendulum. The sphere is filled with water. Suppose there is a small hole in the bottom of the sphere. As the filled sphere swings back and forth, water slowly drains...

Don't know if this has been asked before, but...do we know the period of Earth's rotation at its uppermost ionosphere compared to, say, period of rotation at its polar crust?

[more on the same] function's period i have this function(taken from Fourier analysis): n - 1,2,3... f(x) = cos( (2*pi*n)/L * x ) the literature says this function has L period (n parameter): f(x + L) = cos( (2*pi*n)/L * (x + L) ) = = cos( 2*pi*n/L * x + 2*pi*n) = cos( 2*pi*n/L *...

The average synodic rotational period of the Sun is approximately 27.27 days. (synodic means 'relative to an observer on earth') The sidereal orbital period of the moon around the Earth is known accurately and is 27.321661 days. (sidereal means 'relative to an observer fixed in space' i.e...

does the period or frequency represent an orbit?

Hello. Two binary stars (m1 and m2) orbit each other around their center of mass. They orbit in circles of radii r1 and r2. I am to show that the period is given by T2=4pi2(r1+r2)3/(G(m1+m2)) The mutual force between m1 and m2 is F=Gm1m2/(r1+r2)2 Considering m1, the acceleration of m1 is...

Does anyone know what would be the approximate orbital period (time for one complete orbit) for an apple placed in orbit around Earth at the moon’s distance from Earth?

hi, could someone please help me with this problem?? If a small planet were discovered with a distance from the sun eight times that of the Earth, what would you predict for its period in (Earth) years. (i.e. how many times longer would it take to go round the sun than the Earth does.)

How long (on average) does it take a human to digest food? How long does it take for liquids? Any help will be appreciated.