Physics, 26.09.2019 20:10 stsfrost9328
Agirl is sledding down a slope that is inclined at 30º with respect to the horizontal. the wind is aiding the motion by providing a steady force of 161 n that is parallel to the motion of the sled. the combined mass of the girl and the sled is 87.7 kg, and the coefficient of kinetic friction between the snow and the runners of the sled is 0.151. how much time is required for the sled to travel down a 271-m slope, starting from rest?
Answers: 3
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Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of
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What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?
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Ascientist notices that an oil slick floating on water when viewed from above has many different colors reflecting off the surface, making it look rainbow-like (an effect known as iridescence). she aims a spectrometer at a particular spot and measures the wavelength to be 750 nm (in air). the index of refraction of water is 1.3
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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
Agirl is sledding down a slope that is inclined at 30º with respect to the horizontal. the wind is a...
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