A400-g block of iron at 400°c is dropped into a calorimeter (of negligible heat capacity) containing 60 g of water at 30°c. how much steam is produced? the latent heat of vaporization of water is 22.6 × 10^5 j/kg and its specific heat capacity is 4186 j/kg ∙ k. the average specific heat of iron over this temperature range is 560 j/kg ∙ k.

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 1.90