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.

Most energy in an ecosystem comes originally from_

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.

The release of energy by the nucleus of atom as a result of nuclear fission is radiant energy true false