Ajutati-ma va rog.. am nevoie urgent de rezolvare .două bile identice, avînd sarcinile electrice egale cu +8 nc şi +2 nc, interacţionează cu o forţă egală cu 1,6 mn. bilele au fost puse în contact, apoi îndepărtate pînă la distanţa iniţială. care este valoarea forţei de interacţiune în acest caz?

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Which accounts for an increase in the temperature of a gas that is kept a constant volume

Which is an advantage of subdividing science into different areas?