Physics, 18.07.2019 16:00 hannahbanana2000
Atelegraph pole casts a shadow of 40 feet long when the angle of elevation for the sun is 63°. the pole leans 15° from the vertical, directly toward the sun. find the length of the pole. 37 ft 43 ft 79 ft 171 ft
Answers: 1
Physics, 22.06.2019 18:00
What structural formula represents 4 electrons shared between two atoms?
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Physics, 22.06.2019 21:20
People with normal vision cannot focus their eyes underwater if they aren't wearing a face mask or goggles and there is water in contact with their eyes. in a simplified model of the human eye, the aqueous and vitreous humors and the lens all have a refractive index of 1.40, and all the refraction occurs at the cornea, whose vertex is 2.60 cm from the retina.with the simplified model of the eye, what corrective lens (specified by focal length as measured in air) would be needed to enable a person underwater to focus an infinitely distant object? (be careful-the focal length of a lens underwater is not the same as in air! assume that the corrective lens has a refractive index of 1.62 and that the lens is used in eyeglasses, not goggles, so there is water on both sides of the lens. assume that the eyeglasses are 2.05cm in front of the eye.)
Answers: 3
Physics, 22.06.2019 23:30
Which system of units is used by only a small number of countries in the world, including the u.s.
Answers: 3
Atelegraph pole casts a shadow of 40 feet long when the angle of elevation for the sun is 63°. the p...
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