What is Period and frequency: Definition and 17 Discussions

Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as temporal frequency to emphasize the contrast to spatial frequency, and ordinary frequency to emphasize the contrast to angular frequency. Frequency is measured in hertz (Hz) which is equal to one event per second. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. For example: if a newborn baby's heart beats at a frequency of 120 times a minute (2 hertz), its period, T—the time interval between beats—is half a second (60 seconds divided by 120 beats). Frequency is an important parameter used in science and engineering to specify the rate of oscillatory and vibratory phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light.

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  1. bobacity

    Wave Period Calculation: Is 0.1 the Correct Answer for Frequency of 1/10?

    I think the answer is just 1/10 (according to the formula for period), so the answer is 0.1. Is that correct? Thanks!
  2. Kaushik

    Time period of a periodic function

    Consider the following periodic function: ## f(t) = \sin(ωt) + \cos(2ωt) + \sin(4ωt) ## What is the time period of the above periodic function? The following is given in my book: Period is the least interval of time after which the function repeats. Here, ##\sin(ωt)## has a period ##T_o =...
  3. zzzriprip

    Uncertainty of an oscilloscope frequency, read from the period

    Hi, I am unsure of what uncertainty to get, so here is my full question: I used the CRO for an experiment, and since what I need is frequency, I read the period, so for the uncertainty of the period, it is the smallest division divided by two. So if my uncertainty for period is 0.001s, then what...
  4. A

    Finding the period (T) of a pendulum on Mars

    1. Homework Statement The first astronauts to visit Mars are each allowed to take along some personal items to remind them of home. One astronaut takes along a grandfather clock, which, on earth, has a pendulum that takes 1 second per swing, each swing corresponding to one tick of the clock...
  5. L

    Question regarding centripetal acceleration/period

    Homework Statement A satellite orbits the Earth every 6.0 hours in a circle. Radius = 70,000 km a) What is the period of rotation? b) What is the acceleration of the satellite? Homework Equations a = v2/r Fc = mv2/r v = 2pir/T The Attempt at a Solution For a, I converted 6 hours into 21600...
  6. F

    The reciprocal relationship between frequency and period

    I was asked by a friend to explain why the frequency, ##f## and period, ##T## of a wave. The initial explanation I gave to them was as follows: Heuristically, the period of a wave is defined as ##T=\frac{\text{number of units time}}{\text{cycle}}##, and its frequency as ##f=\frac{\text{number...
  7. Geek007

    Does the non-periodic signals have frequency or not?

    Can someone kindly explain , what is the frequency of non periodic signals? Periodic signals have frequency of number of cycles completed in one second and but non periodic signals don't have repeated pattern so what would be the frequency of non periodic signals. Kindly do explain it in simple...
  8. B

    Period and frequency problem

    Homework Statement Find the period and frequency of the motion of an electron of kinetic energy, E, 34 KeV as is moves in a circular orbit perpendicular to a magnetic field, B, of 0.270 T.Homework Equations For speed, v: For charge, q: For mass, m: For radius, R: For frequency, f...
  9. J

    How do significant digits work in physics calculations?

    A guitar string vibrates 750 times in 3.00s. Calculate period and Frequency. I am in grade 11 and it is my first week in physics 11 so I'm new at this! My question is on how the significant digits work. I don't know where I should leave my answer..Here is my attempt: Period: 3.00/ 750 =...
  10. Z

    Determine the period and frequency of SHM

    A 1 lb weight is suspended from a spring. Let y give the deflection (in inches) of the weight from its static deflection position, where “up” is the positive direction for y. If the static deflection is 24 in, find a differential equation for y. Solve your equation and determine the period and...
  11. J

    Calculate the period and frequency of rotation

    Homework Statement An object rotates in a circle of 2m diameter. The angular speed is 2.5 rad/s. Calculate the period and frequency of rotation. Homework Equations frequency=1/period The Attempt at a Solution That formula seem funny considering i need a value to work out the...
  12. G

    Period and frequency of a pendulum doesn't depend on mass?

    Period and frequency of a pendulum doesn't depend on mass?? for a pendulum: T = 2\pi\sqrt{}length/g and f = 1/2\pi \sqrt{}g/length The mass m of the pendulum bob doesn't appear in the formulas for T and f of a pendulum where T = period and f = frequency How does this make...
  13. M

    Period and frequency of a lightwave

    Homework Statement If a lightwave has a wavelength of 630nm, what is the period and frequency? Homework Equations F=c/v T=1/F The Attempt at a Solution F = 3x10^8/6.3x10^-7 = 4.76Hz T = 1/F = 1/4.76 = 0.21s Am I correct or way off? I converted the wavelength to meters hoping...
  14. r-soy

    What is the formula to use when found to time period and frequency the formula not w

    A sconds pendulum taks 1 s to move from one extreme to the other what is time period ? what is frequency ? what is the formula to use when found to time period and frequency the formula not written in our note
  15. S

    Period and frequency question

    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...