During laser vision correction, a brief burst of 193 nm ultraviolet light is projected onto the cornea of the patient. it makes a spot 1.10 mm in diameter and deposits 0.450 mj of energy. calculate the depth (in μm) of the layer ablated, assuming the corneal tissue has the same properties as water and is initially at 34.0°c. the tissue's temperature is increased to 100°c and evaporated without further temperature increase. (the heat capacity of water is 4,186 j/(kg. °c), its latent heat of vaporization is 2,256 kj/kg, and its density is 1,000 kg/m^3.)
Answers: 1
Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 22.06.2019 12:00
The sun’s mass is 2.0×10^ 30 kg, its radius is 7.0×10 5 km, and it has a rotational period of approximately 28 days. if the sun should collapse into a white dwarf of radius 3.5×10 3 km, what would its period be if no mass were ejected and a sphere of uniform density can model the sun both before and after?
Answers: 3
Physics, 22.06.2019 14:30
Aracecar driver has to hold on tightly when going around a banked curve. approximately what is the centripetal force on a 2220.0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?
Answers: 1
Physics, 22.06.2019 17:30
Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance
Answers: 1
During laser vision correction, a brief burst of 193 nm ultraviolet light is projected onto the corn...
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