) The radius of sphere measured repeated values 5.63 m, 5.54 m and 5.53 m. Determine the most probable value of radius.​

v_{ average} = 5.57

Explanation:

The most probable value of a measure is

       v_average = ∑ x_i

where N is the number of measurements

in tes case N = 3

         v_{average} = ⅓ (5.63 +5.54 + 5.53)

         V_{average} = 5,567

The number of significant figures must be equal to the number of figures that have the least in the readings.

          v_{ average} = 5.57

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation: