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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 0.70MM diameter laser beam with a wavelength of 193nm . Each laser pulse lasts 14ns and contains 1.0mJ of light energy. During the very brief time of the pulse, what is the intensity of the light wave? P=7.1*10^4 W
At its highest temperature, a space heater has a resistance of 35.5 Ω when it is plugged into a wall outlet supplying a peak voltage of 162.6 V sinusoidally at 60 Hz
An electric motor rotating a workshop grinding wheel at a rate of 9.90 x 10^1 rev/min is switched off. Assume the wheel has a constant negative angular acceleration of magnitude 1.70 rad/s2.
you need to store 25J of energy in the magnetic field of a solenoid. The solenoid hass 100 circular turns of diameter 5.0cm, What is the energy density inside the solenoid
A small steel sphere of mass 0.40 kg is attached by a 0.50 m long cord to a swivel pin set into the surface of a friction-less table top. compute the tension in the cord
A lense with a circular aperture of 1cm in diameter is just barely capable of serperating two objects, What's the wavelength of the light from the two objects
Find out kinetic energy of the merry-go-round
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, What is the diameter of the needle
A steel rod is 3 cm in diameter at 25 C. A brass ring has an interior diameter of 2.992 cm at 25 C. At what common temperture will the ring just slide into the rod?
A liquid with a density of 1680 kg/m3 flows through a horizontal pipe with varying cross section. Determine the pressure in the second section
Heat Q flows spontaneously from a reservoir at 445 K into a reservoir at 265 K. Because of the spontaneous flow, 2620 J of energy is rendered unavailable for work when a Carnot engine operates between the reservoir at 265 K and a reservoir at 248 K. ..
A sled weighs 100N. It is held in place on a frictionless 20 degrees slope by a rope attached to a stake at the top, the rope is parallel to the slope. What is the normal force of slope acting on the sled.
An ideal spring with a spring constant of 25.0 N/m is suspended vertically. A 1.00 kg object is attached to the unstretched spring and released. Determine the magnitude of the oscillations
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