After setting up stereo speakers in your schools music room, you notice that in certain areas of the room, the sound from the speakers is very loud. in other areas, the sound is very soft. using the concept of interference, explain why the sound levels in the music room vary.

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

With the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 1.90

Consider the following position function. find (a) the velocity and the speed of the object and (b) the acceleration of the object. bold r left parenthesis t right parenthesisr(t)equals=left angle 6 t superscript 4 baseline comma 2 t cubed right angle6t4,2t3 for tgreater than or equals≥0