Examples of amplitude in the following topics:

 The amount of energy in a wave is related to its amplitude.
 Largeamplitude earthquakes produce large ground displacements, as seen in .
 Loud sounds have higher pressure amplitudes and come from largeramplitude source vibrations than soft sounds.
 In fact, a wave's energy is directly proportional to its amplitude squared because:
 The energy effects of a wave depend on time as well as amplitude.

 Interference occurs when multiple waves interact with each other, and is a change in amplitude caused by several waves meeting.
 In physics, interference is a phenomenon in which two waves (passing through the same point) superimpose to form a resultant wave of greater or lower amplitude.
 When the waves have opposite amplitudes at the point they meet they can destructively interfere, resulting in no amplitude at that point.
 By playing a sound with the opposite amplitude as the incoming sound, the two sound waves destructively interfere and this cancel each other out.
 Pure constructive interference of two identical waves produces one with twice the amplitude, but the same wavelength.

 The abbreviation AM stands for amplitude modulation—the method for placing information on these waves.
 The resulting wave has a constant frequency, but a varying amplitude.
 Thus, since noise produces a variation in amplitude, it is easier to reject noise from FM.
 (c) The frequency of the carrier is modulated by the audio signal without changing its amplitude.
 Amplitude modulation for AM radio.

 Superposition occurs when two waves occupy the same point (the wave at this point is found by adding the two amplitudes of the waves).
 The value of this parameter is called the amplitude of the wave; the wave itself is a function specifying the amplitude at each point.
 Each disturbance corresponds to a force, or amplitude (and the forces add).
 That is, their amplitudes add.
 Constructive interference occurs when two waves add together in superposition, creating a wave with cumulatively higher amplitude, as shown in .

 As the frequency at which the finger is moved up and down increases, the ball will respond by oscillating with increasing amplitude.
 Conversely, for smallamplitude oscillations, such as in a car's suspension system, there needs to be heavy damping.
 Heavy damping reduces the amplitude, but the tradeoff is that the system responds at more frequencies.
 A child on a swing is driven by a parent at the swing's natural frequency to achieve maximum amplitude.
 The amplitude of a harmonic oscillator is a function of the frequency of the driving force.

 The amplitude A and phase φ determine the behavior needed to match the initial conditions.
 F_0$ is the driving amplitude and $\!
 \omega_r = \omega_0\sqrt{12\zeta^2}$, the amplitude (for a given $\!
 For strongly underdamped systems the value of the amplitude can become quite large near the resonance frequency (see ).
 Steady state variation of amplitude with frequency and damping of a driven simple harmonic oscillator.

 where V is the amplitude of the AC voltage, j is the imaginary unit (j2=1), and $\omega$ is the angular frequency of the AC source.
 Thus the resistor's voltage is a complex, as is the current with an amplitude $I = \frac{V}{R}$.
 The amplitude of this complex exponential is $I = j \omega CV$.
 The magnitude of the complex impedance is the ratio of the voltage amplitude to the current amplitude.
 We see that the amplitude of the current will be $V/Z = \frac{V}{\sqrt{R^2+(\frac{1}{\omega C})^2}}$.

 Waves are defined by its frequency, wavelength, and amplitude among others.
 The first property to note is the amplitude.
 The amplitude is half of the distance measured from crest to trough.
 Finally, the group velocity of a wave is the velocity with which the overall shape of the waves' amplitudes — known as the modulation or envelope of the wave — propagates through space.

 Resonance is the tendency of a system to oscillate with greater amplitude at some frequencies—in an RLC series circuit, it occurs at $\nu_0 = \frac{1}{2\pi\sqrt{LC}}$.
 Resonance is the tendency of a system to oscillate with greater amplitude at some frequencies than at others.
 Frequencies at which the response amplitude is a relative maximum are known as the system's resonance frequencies.
 The driving AC voltage source has a fixed amplitude V0.

 A simple pendulum acts like a harmonic oscillator with a period dependent only on L and g for sufficiently small amplitudes.
 Using this equation, we can find the period of a pendulum for amplitudes less than about 15º.
 If θ is less than about 15º, the period T for a pendulum is nearly independent of amplitude, as with simple harmonic oscillators.
 For amplitudes larger than 15º, the period increases gradually with amplitude so it is longer than given by the simple equation for T above.
 For example, at an amplitude of θ0 = 23° it is 1% larger.