Which is an example of a physical change? cake baking

gasoline combusting

salt dissolving

iron rusting

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.

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