W=Fd
W=22,000N*(2,000m)
W=44,000,000J
Einstein showed how the photoelectric effect could be understood
by treating light as a stream of particles, with each particle's energy
depending on the color of the light.
Einstein is famous for his work in Relativity. But it was his explanation
of the photoelectric effect... now a pretty obscure topic ... that won him
his only Nobel Prize.
Gravitational force = Gxm1xm2 /r^2
This equation depends only upon object's masses and distance between them. So option b is correct
Weight equals mass multiplied by the acceleration due to gravity.