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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 15 ns and contains 1.9mJ of light energy.
A) What is the power of one laser pulse?
B) During the very brief time of the pulse, what is the intensity of the light wave?Express your answer to two significant figures and include the appropriate units for both questions.
a bullet of mass 50 g traveling at 400 m/s due north strikes a rock of mass 500 g at rest and ricochets off the rock going due east. How much energy was lost in the collision
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
A velocity selector has a magnetic field of magnitude 0.32 T perpendicular to an electric field of magnitude of 0.34 MV/m. What must be the speed of a particle for it to pass through undeflected
She pumps the handle up and down, slowly lifting the car. What is the force exerted on the small piston during each downward stroke?
A 900N crate slides 12m down a ramp that makes an angle of 40 ? with the horizontal. how much thermal energy is created
A sinusoidal electromagnetic wave emitted by a cellular phone has a wavelength of 34.0cm and an electric-field amplitude of 4.30×10?2v/m at a distance of 200m from the antenna. Calculate the magnetic-field amplitude
A steam turbine is limited to a maximum inlet temp of 800 c the exhaust pressure is .0100 mpa, What is maximum power output per unit mass flow rate
What is the CD's moment of inertia for rotation about a perpendicular axis by the edge of the disk.
Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m..
An object with a mass of 10 kg is resting on a wedge that is 32 degrees from horizontal. What is the normal force exerted on the mass from the wedge
An airtight box has a removable lid of area 2.46 × 10-2 m2 and negligible weight. find the magnitude of the force required to pull the lid off the box
A small, plastic sphere of mass m = 111 g is attached to a string There is an electric field of 122 N/C directed along the + x axis
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