Amole of yellow photons of wavelength 527 nm has kj of energy.

Explanation:

It is known that relation between energy and wavelength is as follows.

            E =

where,    h = plank's constant =

              c = speed of light =

          = wavelength

Convert nm into m as follows.

                       = m

Therefore, calculate the energy as follows.

                 E =

                    =

                    = J

Hence, energy of the yellow light is J.

Now, calculate the moles of yellow light as follows.

               = J

               = 227144 J

or,           = 227.14 kJ        (as 1 kJ = 1000 J)

Thus, we can conclude that a mole of yellow photons of wavelength 527 nm has 227.14 kJ of energy.

massxgravity x heght=weightxheight= pe

4900=490xh

h=10