On and Motion Graphs: Mastery Test 3
Select the correct answer.
Which pair of sentences is describing the same velocity?
OA. A car is parked. A car is moving in circles.
OB. A bus drives 40 miles per hour north. A truck drives 50 miles per hour north.
OC. A boy walks east at 6 kilometers per hour. A girl walks west at the same speed as the boy.
OD. Valerie rides her bike south at 8 kilometers per hour. Owen jogs south at 8 kilometers per hour.
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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.