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2 days ago · Doppler effect, the apparent difference between the frequency at which sound or light waves leave a source and that at which they reach an observer, caused by relative motion of the observer and the wave source. It was first described (1842) by the Austrian physicist Christian Doppler.
- The Editors of Encyclopaedia Britannica
3 days ago · wavelength, distance between corresponding points of two consecutive waves. “Corresponding points” refers to two points or particles in the same phase—i.e., points that have completed identical fractions of their periodic motion.
- The Editors of Encyclopaedia Britannica
1 day ago · If you would like to calculate the resonant frequency of an LC circuit, look no further — this resonant frequency calculator is the tool for you. Enter the inductance and capacitance and in no time at all you'll find the resonant and angular frequency.
2 days ago · ISDB-Tb frequency DTV channel 14 uses 473.142857 MHz, but ATSC 3.0, DVB-T / DVB-T2, and DTMB, use 473.0 MHz. Channel 37 is reserved for radio astronomy in the United States, Canada, Bermuda, Belize, and the Bahamas, thus there are no television stations assigned to it.
3 days ago · With that we can define the frequency response to be the phasor: G (j\omega) = M (\omega) \angle {\phi (\omega)} G(j ω) = M (ω)∠ϕ(ω) Where j = \sqrt {-1} j = −1 . Those definitions are very helpful for us because it helps us interpret the system as a multiplication by a complex number.
4 days ago · A piece of string of linear mass density \(20 \text{ g}/\text{cm}\) oscillating with amplitude \(2 \text{ cm}\) and frequency \(50 \text{ Hz}\) carries an energy of \(12 \text{ J}\) per wavelength of oscillation. What is this wavelength in meters?
3 days ago · Time-harmonic power and energy involve the products of sinusoids and therefore exhibit sum and difference frequencies. More explicitly, we cannot simply represent the Poynting overlinetor →S(t) for a field at frequency f [Hz] by Re{→S _ ejωt} because power has components at both f = 0 and 2f Hz, where ω = 2 π f.
