Period Definition and 997 Threads

Homework Statement An electron enters a uniform magnetic field of 0.152 teslas such that the electron follows a circular path. What is the period of the electron's motion? Electrons have a mass of about 9.11 x 10-31 kilograms each. Hint: Since the radius of the electron's path is not given...

Homework Statement A science fiction tale describes an artificail "planet" in the form of a band completely encircling a sun, the inhabitants living on the inside surface (where it is always noon). Imagine the sun is like our own, that the distance to the band is the same as the Earth-Sun...

How is the formula for period of oscillation derived? t=2pisqrt(m/k)

I have to plot the average period squared vs the mass, now my question is which goes to the x-axis and which goes to the y?

Homework Statement A particle of mass 0.5kg is attached to one end of a light elastic string, natural length 1.2m, it has a modulus of elasticity of 29.4N. When at rest it lies 1.4m directly beneath A. The particle is then displaced 1.75m directly below A & released from rest. Find the...

Homework Statement A disk of mass m and radius a is suspended horizontally by a rod bored through the disk at a location d distance from the center. When in equilibrium the center of the disk is directly below the rod. Obtain an approximate expression for the period, ignore disapative...

I am doing a home project for my Physical science concepts class. i need to find the period of a pendulum's swing. the prof. gave us the formula, T=I/f and tells us that T is the period, and f is the frequency of the swing, but doesn't say what I is. Does anyone know?

Homework Statement Hi! This is from Physics for Scientists and Engineers, Vol. 6 by Tipler and Mosca. 44. Kepler's third law relates the period of a planet to its orbital radius r, the constant G in Newton's law of gravitation, and the mass of the Sun Ms . What combination of these factors...

Hello everyone, I'm new here, sorry if I make mistakes. My english is poor. Prove that : T=2\pi \sqrt{\frac{l}{g}} where l is length and g is gravity I hope you understand my question, else: I will try to write it again. Thank you !

Homework Statement A 200 g mass elongates a spring 3 cm from its equilibrium position. Find the spring constant (k) of the spring in N/m. An unknown mass is attached to the same spring and set in motion. If the period of oscillation is 3 seconds, find the value of the unknown mass in...

i am stuck on this question and people are giving me different answers. Ok which period 3 element has the following succesive ionization energies: 1800,3000,3600,5800,13200

Homework Statement Is Time Period = \int \frac{1}{v} dx ?? If yes, the under what limits of integration??

In the book "Fundamentals of Physics" by H D Young and Freedman,there is formula about the time period of simple pendulum which uses sine function in a complex way which i think is obtained by series expansion of sine function either by Maclurin or Tayler series. Can anyone please tell me how...

Homework Statement Consider a light rod of negligible mass and length "L" pivoted on a frictionless horizontal bearing at a point "O." Attached to the end of the rod is a mass "m." Also, a second mass "M" of equal size (i.e., m=M) is attached to the rod (0.2L from the lower end). What is the...

We know that the orbital period of binary stars decay due to the emission of gravity waves that carry away energy from the system. What is the form of the energy loss of the system: kinetic energy or potential energy?

We know that the orbital period of binary stars decay due to the emission of gravity waves that carry away energy from the system. What is the form of the energy loss of the system: kinetic energy or potential energy?

Homework Statement Find the period T for a wave of wavelength (lambda) . Express the period in terms of pi, lambda , and g. Homework Equations T = lambda/velocity, lambda = velocity/frequency T= 1/frequency k (wave number) = 2pi/lambda V = Squareroot of (g/k) The Attempt at a...

Traveling Waves Homework Statement If the period of the oscillator doubles, what happens to the wavelength and wave speed? The wavelength is halved but the wave speed is unchanged. The wavelength is unchanged but the wave speed doubles. The wavelength doubles but the wave speed is...

Homework Statement The questions are about binary star system. Homework Equations Why the two stars in a binary star system are always diametrically opposite positions? Why the two stars have common period? Why the inner star is more massive? The Attempt at a Solution For the...

Homework Statement 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 10.4 s. The acceleration of gravity...

Homework Statement A neutron star has a radius of 10,000 km, and takes a planet 30 days to complete one revolution around the star. When the star collapses, the new radius is 3 km. Find the new period of revolution of the newly formed neutron star. Homework Equations T=2(pi)/omega omega...

A uniform meter stick is hung at its center from a thin wire. It is twisted and oscillates with a period of 5 s. The meter stick is then sawed off to a length of 0.76 m, rebalanced at its center, and set into oscillation. what is its new period I= 1/12 mL^2 equation: T= 2 pi * sqrt (I/k) where...

Homework Statement Is it possible to figure out the orbital period of an object with only the orbital radius given? --- It seems to be with the equations given too little information Homework Equations The Attempt at a Solution

Homework Statement Given circuit consists of two resistors ( R1 = 330 Ohm , R2 = 22K Ohm ) , an LED ( Forward voltage = 1.6V, forward current = 20 mA) , a BC 337 NPN transistor and a 9V battery supply. I need to find the total power consumed by the circuit for a run time of continuous 1...

Homework Statement Find the speed of an Earth satellite whose orbit is 400km above the Earth's surface. What is the period of the orbit. Homework Equations The first part was pretty easy. I used v=[(Gm)/r]^(1/2) to get the answer. The Attempt at a Solution For the first part, I...

My question is regarding when the the CMB was created. I understand that it is predicted to have been "when the universe cooled to about 3,000K". However, might it have been possible that different areas of the universe reached that temperature and decoupled a little earlier than others? This...

Is it possible to find out how much the universe grew by during the period of inflation after the big bang?

Homework Statement Derive the period of a sphere oscillating in a hemispherical concave surface at small angles. Homework Equations Net Torque = I x alpha Delta E_m = 0 The Attempt at a Solution The thing is, tried using the conservation of mechanical energy to get an expression...

Homework Statement You drill a hole at the end of a solid thin rod of length 1.3 m, and then attach the rod through this hole onto an approximately frictionless pivot. You then release the rod from rest at a reasonably small angle from vertical, so that it executes simple harmonic motion...

I did a lab on pendulums and I need to answer the following: Examine the experimental evidence in regards to each of the properties of the pendulum, mass, horizontal displacement and length. Predict the equation for the period of a pendulum and calculate it based on your observations. The...

Homework Statement Consider a planet with uniform mass density p. If the planet rotates too fast, it will fly apart. Show that the minimum period of rotation is given by T^2 = 3(pie)/Gp Homework Equations F = ma = Gm1m2/R^2 (Equation 1) a = v^2/R (Equation 2) v= 2(pie)R/T...

Anyone with the same experience? we are going through this on the laboratory, we quiet don't know how to treat it but I want to be the first to figure it out... I know what it is but we need to solve how to make it stay on a normal radioactive rate before it goes critical (acourding to the...

How would I find Jupiter's equatorial rotation period when it begins to tear the planet apart? Is it true that if the centrifugal force is greater than the gravitational force the material can be torn apart? If this is right, can I just set up an inequality for the centrifugal force >...

Homework Statement Two moons orbit a planet in nearly circular orbits. Moon A has orbital radius r, and moon B has orbital radius 5r. Moon A takes 50 days to complete one orbit. How long does it take moon B to complete and orbit? Homework Equations Kepler's Third Law The...

Homework Statement The elements of f(t) are 1+kt and t here are 0<t<1 the other element is 1 and t here are 1<t<2. f(t+2)=f(t) prove if k is not equal to zero, the period f is 2. i know the graph of element 1 but how should I graph the other element with k. Based from the graph...

Homework Statement The function is defined on (-infinity, +infinity) Find the fundamental period of sin(5t+\pi) Homework Equations The Attempt at a Solution f(x)=sin(5t+\pi) f(x)=f(x+2p) f(x+2p)=sin(5t+\pi+2p) f(x+2\pi/5)=sin(5t+\pi+2\pi/5) The period i got was...

Homework Statement Three satellites orbit a planet of radius R, as shown in the figure. Satellites S_1 and S_3 have mass m. Satellite S_2 has mass 2 m. Satellite S_1 orbits in 250 minutes and the force on S_1 is 10,000 N. See attached figure (knight_Figure_12_26.jpg). a. What is the...

Homework Statement Measure the period of oscillation of a meter stick suspended at one end for small amplitudes. Does T = 2*sqrt(2I/mgL) when I is the rotational inertia about one end? Derive this relation. Homework Equations I = rotational inertia m = mass g = gravitational...

Homework Statement A simple pendulum uses a steel wire as the string. The length of this wire is 1.1m at room temperature. If the temperature is increased by 10.8 degrees Celsius, the length of the wire increases by 1.58 mm. What is the change in period of the pendulum? Homework...

Hi I've been given this question for cooursework and am really struggling, help needed! heres the question: What is the period of the function? f(t) = 3t 0≤t≤π, where f(t)=f(t+1) Homework Equations The Attempt at a Solution

Homework Statement Hey guys I am not sure how to find the period when I am given the mass and the time, for example mass= .10 k and Time for vibrations= 8.86s Find the Period Homework Equations Im not sure maybe f = 1/t The Attempt at a Solution No idea how to incorporate mass in...

Homework Statement A comet of the star Sol has an eccentricity of .7. It takes 200 yrs to complete on orbit 1)find the average distance of the comet from Sol. 2) Find the perihelion and aphelion distances from Sol 3)find the velocity of the comet at perihelion Homework Equations...

Homework Statement Draw a sketch of of a standing wave created by a string fixed at two ends, the frequency is 60 Hz, the wavelength is 0.4 m. Draw a profile with times t=0, T/4, T/2, 3T/2 Homework Equations period= 1/frequency, The Attempt at a Solution i know that at t/4, you...

Ref: http://www.bbc.co.uk/dna/h2g2/A29019332 Does this constellation appears moving from the Earth's reference? I have just read that it travels the 12 zodiacal constellations with a speed of about 67 years per degree. Any thoughts about it? Just found that it is the star Altair...

URGENT//Period and frequency question Homework Statement 1) An adult and a child are sitting on adjacent identical swings. Once they get moving, the adult, by comparison to the child, will necessarily swing with a) a much greater period b) a much greater frequency c) the same...

Homework Statement I have to show the formula derivation of this: T=2*pi*\sqrt{\frac{2IL}{pi*r^{4}*G}} based on the fact that I know this: \tau=I\alpha=\frac{pi*G*r^{4}}{2L}\theta Homework Equations See above The Attempt at a Solution Well, I know T=2pi/\omega and...

Homework Statement A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is T = 1.78 hours. What is density (mass/volume) of the planet? Assume that the planet has a uniform density.Homework Equations T^{2}=4*PI^2*r^3/G*M Density =...

Homework Statement Hi! I have a problem with mathematical pendulum. I had to prove that the right expression for the period of the mathematical pendulum is: T=\sqrt{\frac{8l}{g}}\int_0^{\theta_0}\frac{d\theta}{\sqrt{\cos \theta- \cos \theta_0}} I did that via energy, but now I have to...

Homework Statement Given data: A moon of Mars orbits with a period of 459 minutes. The radius of the moon's orbit is 9.4x10^6 m. What is the mass of mars? Homework Equations The Attempt at a Solution The only relevant equation I could find was Fmars on moon= (G*m1*m2)/(r2)...

Homework Statement The space shuttle is in a 310 mile high orbit. What are the shuttle's orbital period, in minutes, and its speed? Homework Equations Period = 2(pi)r/v The Attempt at a Solution I can't figure out how to find the period without already having the velocity.