Proxima du Centaure, l’étoile la plus proche de la Terre après le Soleil, est située à 40 000 milliards de kilomètres de la Terre. 1 / Calcule le temps qu’il faut à la lumière pour parcourir cette distance

Avery long solenoid of inner radius 2.75 cm creates an oscillating magnetic field of the form = for this solenoid, =0.00425 t and =319 rad/s. (a)what is the maximum value of the induced electric field at a perpendicular distance 1.45 cm from the axis of the solenoid? (b) what is the maximum value of the inducted electric field at a point 5.85 cm perpendicular from the axis of the solenoid?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

The discovery of the electron as a subatomic particle was a result of