In the figure particles 2 and 4, of charge –e, are fixed in place on a y axis, at y2 = -11.7 cm and y4 = 5.85 cm. Particles 1 and 3, of charge –e, can be moved along the x axis. Particle 5, of charge +e, is fixed at the origin. Initially particle 1 is at x1 = -11.7 cm and particle 3 is at x3 = 11.7 cm. (a) To what x value must particle 1 be moved to rotate the direction of the net electric force F net on particle 5 by 30 ˚ counterclockwise? (b) With particle 1 fixed at its new position, to what x value must you move particle 3 to rotate back to its original direction?

J. j. thomson’s experiment disproved the theory that an atom

The heliocentric and the geocentric models of the solar system included these central principles

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.