Physics 1B CBE questions & answers rated A+

Physics 1B CBEamplitude - correct answer the distance from the midpoint to the crest (or trough) of a wave; equals the maximum displacement from equilibrium antinodes - correct answer the positions on a standing wave with the largest amplitudes; occur halfway between nodes blue shift - correct answer an increase in frequency toward the high-frequency, or blue, end of the color spectrum bow wave - correct answer the V-shaped wave produced by an object moving on a liquid surface faster than the wave speed; made by the overlapping crests of the wave constructive interference (reinforcement) - correct answer when the crest of one wave overlaps the crest of another, their individual effects add together, and the result is increased amplitude crest - correct answer the high points of waves destructive interference (cancellation) - correct answer when the crest of one wave overlaps the trough of another, their individual effects are reduced, and high wave simply fills the low part of the other Doppler effect - correct answer the apparent change in frequency due to the motion of a source (or receiver), named after Austrian scientist Christian Doppler; the greater the speed of the source, the greater the effect frequency - correct answer how often a vibration occurs; specifies the number of back-and-forth vibrations a pendulum makes in a given time (usually one second) hertz (Hz) - correct answer the unit of frequency, equal to one cycle per second in phase - correct answer when the crests of one wave overlap the crests of another, and the troughs overlap as well in wave interference; arrive "in step" interference pattern - correct answer a pattern formed by the overlapping of two or more waves that arrive in a region at the same time longitudinal wave - correct answer when the particles of the medium move along the direction of the wave rather than at right angles to it; includes sound waves node - correct answer the parts of the rope that remain stationary in a standing wave out of phase - correct answer when the crests of one wave overlap the troughs of another to produce regions of zero amplitude in wave interference; arrive "out of step" period - correct answer the time a wave takes for one complete back-and-forth vibration red shift - correct answer a decrease in frequency toward the low-frequency, or red, end of the color spectrum shock wave - correct answer a cone shaped wave produced by an object moving at supersonic speed through a fluid; produced by overlapping spheres simple harmonic motion (oscillatory motion) - correct answer the back-and-forth vibratory motion of a swinging pendulum sine curve - correct answer a pictorial representation of a wave produced by simple harmonic motion sonic boom - correct answer the explosive sound heard when a shock wave from an object traveling faster than the speed of sound reaches a person's ears standing wave - correct answer a wave in which certain parts of the medium remain stationary due to complete destructive interference; incident and reflected waves interfere