What is one example of an individual in an ecosystem?

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th