Cheatography

# Tahsili Physics (Waves and Sound) Cheat Sheet by TheGoldenClover

2024 Tahsili Physics: Waves and Sound

### Periodic Motion

 Periodic Motion motion in which the restoring force is directly propor­tional to the displa­cement (springs and pendulum) Hook's Law states that the force required to compress a spring by a distance is proprt­ional to the distance Hook's Law Equation F = -kd (k is the spring constant) PE of a spring PE = 1/2 x k x d2 applic­ation of a simple pendulum to determine the gravit­ational accele­ration Periodic Time T = 2(pi)√­(L/g)

### Mechanical Waves

 Transv­ersal Waves waves that oscillate perpen­dic­ularly to their direction of motion Longit­udinal Waves waves that oscillate in the same direction as their motion Surface Waves waves that move perpen­dic­ularly and parallel to the direction of motion One dimesional wave ex: Rope Two dimens­ional Wave ex: water waves Three dimens­ional waves ex: sound and EM waves

### Doppler Effect

 Doppler Effect the change in frequency produced by a moving source with respect to an observer Doppler Effect Formula fo = fs(v±vo / v±vs) vo is positive if the observer moves towards the source vs is positive if the source moves away from the observer

### Waves

 Mechanical Wave a wave that requires a medium to translate in Electr­oma­gnetic Wave a wave that does not require a medium Amplitude the maximum displa­cement from the equili­brium position Periodic Time the time needed to complete one full cycle Frequency the number of cycles completed in one second Frequency Formula f = 1/T Wavelength (λ) The distance between two crests or troughs Wavelength Formula λ = v / f (v is the wave speed ) The energy carried by a wave is directly propor­tional to the amplitude squared

### Standing Waves

 standing waves a combin­ation of two waves moving in opposite direct­ions, while having the same amplitude and frequency Nodes positions on a standing wave where the wave stays in a fixed position due to the destru­ctive interf­erence Antinodes positions on a standing wave with the highest amplitude the number of nodes are always greater than the number of antinodes

### Sound Waves

 Sound wave a longit­udinal wave composed of compre­ssions and rarefa­ctions, and whose speed is directly propor­tional to temper­ature Loudness depends on amplitude Pitch depends on frequency Sound Intensity the relative sound intensity compared to a specific standard intensity expressed in decibels humans can hear noises between 20 Hz and 20,000 Hz

### Standing Waves in Air Columns

 Formula for two open ends (antinodes are greater) λ = 2L / n (n is the harmonic level) Formula for a closed column (nodes = antinodes) λ = 4L / n (n is the harmonic level)

## Related Cheat Sheets

Science Electricity Review Cheat Sheet
A-Level Physics Key Terms Cheat Sheet
Tahsili Physics (Light) Cheat Sheet

## More Cheat Sheets by TheGoldenClover

Tahsili Bio (Invertebrates) Cheat Sheet
Tahsili Physics (Energy and Machines) Cheat Sheet
Tahsili Chemistry (Chemical Calculations) Cheat Sheet