If solar radiation is 1200 w/m2 , how many photons strike the leaf every second? assume three significant figures and an average wavelength of 504 nm for solar radiation.

Power received by the beam of photons is given as

Power = number of photons per second * energy due to one photon

here we know that

= planck's constant

= speed of light

= wavelength of photons

so above photons per second strike with it

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)