Two sound waves of the same frequency and amplitude are broadcast from speakers at opposite ends of a theater. in the middle of the theater, you hear a sound 6 db louder than that from either speaker. which of the following is true?

a) the two waves are in phase in the middle of the theater.

b) the two waves are 180° out of phase in the middle of the theater.

c) the two waves are 90° out of phase in the middle of the theater.

d) the two waves are 45° out of phase in the middle of the theater.

Why do scientists believe that light is made of streams of particles? scientists believe that light is made of streams of particles because only the presence of photons can explain phenomena observed during experiments on the photoelectric effect. these observations include only some frequencies of light causing the ejection of electrons, no time gap existing between light striking a metal and electrons being ejected, and intensity having no effect on the kinetic energy of the ejected electrons.

The slope of a velocity time graph over any interval of time gives the during that interval

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it