Amerry-go-round on a playground consists of a horizontal solid disk with a weight of 810 n and a radius of 1.48 m. a child applies a force 50.5 n tangentially to the edge of the disk to start it from rest. what is the kinetic energy of the merry-go-round disk (in j) after 3.05 s?
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Physics, 22.06.2019 14:30
Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false
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Physics, 22.06.2019 19:50
An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)
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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.)
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Amerry-go-round on a playground consists of a horizontal solid disk with a weight of 810 n and a rad...
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