BackPhysics Final Exam Review Flashcards
05:51
Terms in this set (27)
The amount of time it takes to complete one repetition of a vibration or wave. Measured in seconds (s).
The number of repetitions per unit time, measured in hertz (Hz).
\(f=\frac{1}{T}\)
The distance between successive repeating points on a wave, such as crest to crest or trough to trough. Measured in meters (m).
The maximum displacement from the equilibrium (midpoint) position in a wave. Measured in meters (m).
The speed at which a wave travels through a medium. Calculated by \(v=f\lambda\). Measured in meters per second (m/s).
When two or more waves combine to reinforce each other, increasing the amplitude.
When two or more waves combine to cancel some or all of the amplitude.
A wave formed by the interference of a wave and its reflection, resulting in nodes and antinodes where parts of the wave appear stationary.
A point on a standing wave with minimum or zero displacement.
A point on a standing wave with maximum displacement.
The change in observed frequency of a wave due to the relative motion of the source or observer.
Sound is a longitudinal wave that travels through a material medium.
The perceived frequency of a sound wave; higher frequency corresponds to higher pitch.
Infrasonic: sounds below 20 Hz (below human hearing).
Ultrasonic: sounds above 20,000 Hz (above human hearing).
Depends on the material through which sound travels; generally faster in solids than in gases.
Large increase in amplitude when forced vibrations match an object's natural frequency.
The force between two charged bodies: \(F=\frac{kq_1q_2}{d^2}\), where \(k=9\times10^9\,N\cdot m^2/C^2\).
The force per unit charge at a point in space: \(E=\frac{F}{q}\).
Relationship between voltage, current, and resistance: \(V=IR\).
Power is the product of current and voltage: \(P=IV\).
Total resistance is the sum: \(R_{tot}=R_1+R_2+R_3+\cdots\).
Reciprocal of total resistance is the sum of reciprocals: \(\frac{1}{R_{tot}}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+\cdots\).
Force magnitude: \(F_B=qvB\), strongest when velocity is perpendicular to magnetic field.
Point fingers in velocity direction, palm faces magnetic field, thumb points in force direction.
Always come in north and south pairs; like poles repel, opposite poles attract; no magnetic monopoles exist.
Induced voltage is proportional to number of loops times rate of change of magnetic field: \(V_{induced} \sim N \frac{\Delta B}{\Delta t}\).
Voltage and number of turns relate as: \(\frac{V_1}{N_1}=\frac{V_2}{N_2}\).