No sistema de corpos da figura a aceleração da gravidade vale 10 m/s², a massa a vale 4 kg e a massa b vale 6 kg. se o atrito entre o plano e a superfície de apoio é desprezível então a aceleração do conjunto é : a. 1 m/s² b. 4 m/s² c. 6 m/s² d. 0,25 m/s² e. 10 m/s²

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

(1 point) match the differential equations and their vector valued function solutions. you may wish to multiply at least one solution out fully, to make sure that you know how to do it. you can get the other answers quickly by process of elimination and just multiply out one row element.

If element x has 99 protons how many electrons does it have