My notes ask your teacher +-/1 points serpse10 17.7.op.029. two loudspeakers placed next to each other each emit a pure tone with the same amplitude. one speaker emits a tone with a frequency of 577.0 hz, the other with a frequency of 570.0 hz. a distant listener perceives a pure tone that has a single frequency, but varies in loudness with a perceived "beat." (a) what is the frequency (in hz) of the pure tone perceived by the listener? (round your answer to at least the nearest integer) (b) what is the best frequency (in hz) perceived by the listener? need ? read it

The lights used by mark watley (played by matt damon) during the film the martian seem to be metal halide lamps. metal halide lamps are filled with vaporized mercury and metal-halogen compounds. when an electric current is passed through the lamp, the tube begins to glow a bright white/blue color. if you were to pass this light through a prism to separate the individual light frequencies, you would see a rainbow just as you would if using natural sunlight because of the complexity of the metal halide gas and the vast amount of possible electron transitions. (the study of light in this way is known as spectroscopy and allows astronomers to know exactly what atoms compose distant stars, simply by looking at the light they emit. the spectral lines an atom produces uniquely identifies that atom just like a fingerprint uniquely identifies a person. the momentum equation and energy equation that we have used above can be combined to give the following equation: c = e p where again p is the phonon momentum, e is the photon energy and c is the speed of light. when you divide the photon energy found in #6 by the photon momentum found in #4, do you get the speed of light? (if not, check your work for questions #4 through #6). yes no

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these

The radius of a sphere is increasing at a rate of 9 cm/ sec. find the radius of the sphere when the volume and the radius of the sphere are increasing at the same numerical rate.