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A laser beam of unknown wavelength is incident on a single slit of width 0.25 mm and forms a Fraunhofer diffraction pattern on a screen 2.0 m away. The width of the central bright fringe is measured to be about 7 mm. What is the wavelength of the laser light?
What might the laser be?
A soccer player kicks the ball toward a goal that is 27.0 m in front of him. Find the speed of the ball when the goalie catches it in front of the net
The Sun is a low mass star and so would never have the core fusion reactions of massive stars. Yet, the Sun has iron in its atmosphere, as well as gold, silver and other elements much heavier than iron and why?
A small piece of dust of mass m = 1.0 µg travels through an electric air cleaner in which the electric field is 500 N/C, What is the charge on the dust particle
n = 3.78 mol of Hydrogen gas is initially at T = 366 K temperature and pi = 2.88×105 Pa pressure. How much work did the external force perform
The E' is an unstable particle, with a mean lifetime on 2.5x10^-10s. What is the minimum uncertainty in this particles energy
The index of refraction for a diamond for red light of wavelength 654 nm is 2.35, Find the angle of refraction for red light
An electric field of 490000 N/C points due west at the certain spot. What is the magnitude of the force that acts on a charge of -8.3 C at this spot.
If wind blows at 32 m/s over a house, what is the net force on the roof if its area is 238 m2 and is flat
A bolt is to be tightened with a torque of 8.0 Nm. what is the least amount of force you must exert
A tank contains mercury, whose density is 13,600 kg/m^3. Find the force exerted by the mercury on a circular plug
A 45-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 25 degrees , At what angle does the crate begin to slide
Find out the translational speed at the bottom of the fall where it is horizontal. Ignore the frictional losses and assume mass of the cylinder is distributed uniformly.
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