A. quelle espèce chimique est mise en evidence par le test? b. pourquoi ne faut il pas toucher les parois du recipient?

c. pourquoi le bûchette se consume t elle plus rapidement dans le recipient?​

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?