A jet takes off from Toronto and flies directly to San Francisco on a heading of (W21S). A wind blows out of form the direction of (S11E). The distance between the two cities is 3564 km and
the jet is capable of cruising at 650 km/h in still air. If the entire trip takes 7.0 hrs what is the jets
ground speed, what is the wind speed and in what direction should the captain point the jet.

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.