What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 470 nmnm ? The index of refraction of the film is 1.33, and there is air on both sides of the film.

3. on your graph, the data points between the black squares are data for elements with atomic numbers 3 through 9. locate these elements on your periodic table. what term or description would you use to identify these elements with respect to the periodic table?

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Determine the fraction of the magnitude of kinetic energy lost by a neutron (m1 = 1.01 u) when it collides head-on and elastically with a target particle at rest which is 21h (heavy hydrogen, m = 2.01 u).