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Another laser amplifier gives an output of 5I0 when it receives input intensity I0 tuned to ?0, the centre frequency of the laser transition. When the input radiation istuned to nearby angular frequency ?1, an input intensity of 3I0 is amplified to an output intensity of 7I0.
What is the ratio of the gain-cross sections at the two frequencies?
two 1.9kg masses are 1.5m apart center to center on a frictionless table. each has 9.3?c of charge.what is the
in a game of basketball, a forward makes a bounce pass to the center. What horizontal distance does the ball cover before bouncing
A flywheel comprises a uniform circular disk with a mass of 101.0 kg and a radius of 1.1 m. It rotates with an angular velocity of 1183 rev/min. what is the tangential force
At time t = 0 and at position x = 0 m along a string, a rightward (+x dir) travelling sinusoidal wave with frequency of 220 Hz has displacement y = +4.0 mm, What is the smallest positive phase angle for this wave
What is the least time necessary for crossing
A heat pump has a coefficient of performance equal to 4.35 and requires a power of 1.77 kW to operate. How much energy does the heat pump add to a home in one hour
Compute the rms speed of a nitrogen molecule at 12.0°C and At what temperature will the rms speed be half that value
A 2500 kg truck moving at 10 m/s strikes a car waiting at a traffic light, hooking bumpers. What was the mass of the struck car
A satellite in a circular orbit around the earth with a radius 1.011 times the mean radius of the earth is hit by an incoming meteorite. Calculate the amount of that work converted to heat
The arm of a person weighs 41.5N, which acts at the center of mass that is located 29.0cm from the rotation point in the shoulder. What is the force required by the deltoid muscle, Fd, to hold the arm parallel to the floor
The index of refraction for a certain kind of glass is 1.648 for violet light and 1.619 for red light. find the difference between the angles of incidence of the two rays
light of wavelength 610nm is incident on a slit of width .20mm and in interference pattern is produced on a screen that is 1.5m from the slit. what is the width of the central bright fringe
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