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A laser of wavelength 1030nm has an initial beam diameter of 1.5 mm, and the divergence half-angle of the conical beam is 1:6. Determine the spatial coherence length of the beam.
Suppose that a person pushes a box with a constant force of 100 N over a distance of 25 meters. What is the change in kinetic energy
one mole of an ideal gas at 1 atm and 0 C is compressed isothermally from 50 L to 20 L. What is the change of internal energy for this gas
A refracting telescope has an objective and an eyepiece that have refractive powers of 1.25 diopters and 300 diopters, respectively. Find the angular magnification of the telescope
A 65.0-kg person throws a 0.0410-kg snowball forward with a ground speed of 26.0 m/s. What are the velocities of the two people after the snowball is exchanged
A liquid is flowing through a horizontal pipe whose radius is 0.0269 m. The pipe bends straight upward through a height of 7.90 m and joins another horizontal pipe whose radius is 0.0755 m. What volume flow rate will keep the pressures in the two hor..
A harmonic wave is traveling along a rope. It is observed that the oscillator that generates the wave completes 42.0 vibrations in 27.0 s. Also, a given maximum travels 430 cm along the rope in 6.0 s. What is the wavelength? cm
A cannon fires a cannon ball at 999.16 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
A spherical hydrogen-filled balloon is used to lift a load of 5705 N (in addition to the weight of the hydrogen). Find the minumum necessary radius for the balloon
A golfer drives a 0.046kg golf ball from an elevated tee, giving the ball an initial horizontal velocity of 45 m/s. (a) what is the magnitude of the average force exerted by the club on the ball if the contact time for the golf club on the ball du..
In a double-star system, two stars of mass 6.0 *10^30 kg eachrotate about the system's center of mass at a radius of 2.0 * 10^11m. What is their common angular speed?
A spherical surface completely surrounds a collection of charges. Find the electric flux (with its sign) through the surface if the collection consists of (a) a single +1.90 × 10-6 C charge, (b) a single -2.40 × 10-6 C charge, and (c) both of the ..
A particle has an acceleration of 6.39 for 0.28. At the end of this time the particle's velocity is 9.31 .What was the particle's initial velocity.
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