Calculate the average value for the following experimentally determined numbers: 2.78,2.53,2.36,2.81,and 2.37.(b) if the standard value is 2.66 , what is the percent error in your measurement? all numbers have units of cm.

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