Physics, 19.02.2020 20:48 cheervolley
The radius of the sun is 700,000 km and the radius of Earth is 6400 km. If the Earth-moon system is 150. million km from the sun, then about how long is the umbra of Earth in kilometers?
Answers: 1
Physics, 21.06.2019 15:00, garciagang0630
Amplitude is a measure of a waves a; speed b; distance c; energy d; frequency
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Physics, 22.06.2019 14:20, timothyashburn8
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.
Answers: 1
Physics, 22.06.2019 16:40, sabrinarea041904
Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.
Answers: 3
The radius of the sun is 700,000 km and the radius of Earth is 6400 km. If the Earth-moon system is...
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