B) Calculer l'intensité du courant qu'elle débite quand la tension à ses bornes vaut U = 3,2 V. On dispose d'une pile, de f. e.m. 12,0 V, de résistance intérieure 1,50 Homme
a) Ecrire l'équation de sa caractéristique U = f(1).

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.

What’s #16 asking me and how do i solve it?

Aboy with a mass 25 kg climbs into a small tree. he sits on a branch that is 2.o m above to the ground.what is his gravitational potential energy above the ground?