A cylinder of mass M = 2 kg and moment of inertia MR 2 /2 has a light thread wrapped several times around it. The free end of the thread is attached to a mass m = 4 kg. Determine the acceleration of the mass and the tension in the string when the mass is released from rest. Show the work please.

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.)

The smallest particle of an element that retains its identity in a chemical reaction. true or false

Why does the liquid rise up through the dip tube when the valve is open