Physics, 22.08.2019 21:30 thebomb2023
Wanting to save a few bucks, bill lights his house with clearance halloween lights which are orange (600 nm) and purple (400 nm). a- what is the photon energy corresponding to each of these colors? b- light from both colors are shined on a metal and electrons are emitted from the metal, however the emitted electrons have no kinetic energy. what is the binding energy of the metal?
Answers: 3
Physics, 22.06.2019 05:30
Mutt and jeff are running along a path each pushing a cart loaded with rocks. if mutt's wagon has a mass two times greater than jeff's and they want to stay together, arriving at their destination at the same time, what must happen? a) jeff should slow down so mutt can catch up. b) mutt must use half as much force to push his cart. c) mutt must use twice as much force to push his cart. d) mutt and jeff will use the same force, but mutt will take bigger steps.
Answers: 1
Physics, 22.06.2019 14:20
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 15:10
What does si stand for,when referring to a system of measurement
Answers: 1
Physics, 22.06.2019 15:50
How many neutrons does plutonium -196 with an atomic number of 78.
Answers: 3
Wanting to save a few bucks, bill lights his house with clearance halloween lights which are orange...
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