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LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. A typical LASIK laser emits a 1.0-mm-diameter laser beam with a wavelength of 193 nm. Each laser pulse lasts 20 ns and contains 1.9 mJ of light energy.
A. What is the power of one laser pulse? Express your answer to two significant figures and include the appropriate units.
B. During the very brief time of the pulse, what is the intensity of the light wave?
One end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 85.0 m. What is the wave speed at the bottom of the rope
q1. a man pushes the lawn mower on a level lawn with a force of 240 n. if 40 percent of this force is directed downward
In your lab is a steel vessel having a volume of 15.0L you charge the vessel with 2.00 moles of H2 and 1.00 moles of O2. What is the partial pressure of the hydrogen
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A bungee jumper with mass 60.0kg jumps from a high bridge. after reaching his lowest point, estimate the unstretched length of the bungee cord assuming SHM
As you sit facing your computer screen, electrons are directed from a source at the back of the computer toward you and are deflected by a magnetic field. Which direction must the magnetic field be oriented in order to direct the electrons to the ..
A student is reading a lecture written on a blackboard. The lenses in her eyes have a refractive power of 69.40 diopters, How far (in meters) is the blackboard from her eyes
A uniform, solid, right, circular cylinder rolls down an 4.00 m incline without slipping. How fast will the cylinder be rotating at the bottom
A hill that has a 15.8 % grade is one that rises 15.8 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
A simple pendulum is made of a small blob of mass m = 9.500 kg attached to the end of an inextensible wire. What is the magnitude of the tension in the wire
An object with mass m1 = 4.90 kg, rests on a frictionless horizontal table and is connected to a cable that passes over a pulley, Find the magnitude of the acceleration of each object
Find the relationship between the length h and width a of a regular right triangular prism such that the prism is equally likely to land on each face when: A. dropped from a great height in th air.
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