3. As density of a medium (increases/decreases) the speed of sound (increases/decreases).​

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Asimple electrochemical cell contains two electrodes.

50.)the diagram below represents the wave fronts produced by a point source moving to the right in a uniformmedium. observers are located at points a and b.compared to the wave frequency and wavelength observed at point a, the wave observed at point b has a(1) higher frequency and a shorter wavelength(2) higher frequency and a longer wavelength(3) lower frequency and a shorter wavelength(4) lower frequency and a longer wavelength