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(a) A hydrogen atom has its electron in the n = 4 level. The radius of the electron's orbit in the Bohr model is 0.847 nm. Find the de Broglie wavelength of the electron under these circumstances.
X-rays of energy 30 keV are direcyed onto a cubic crystal. The first diffraction peakis measured to 35 degrees from the primary crystal plane, What is the atomic spacing of the crysta's primary Bragg planes
a 120 v rms voltage at at 100 hz is applied to a 200 mh inductor a 4 uf capactiro and a ressistor. if the rms value of
a dockworker loading crates on a ship finds that a 22 kg crate initially at rest on a horizontal surface requires a
A car moving with an initial speed v collides with a second stationary car that is one-half as massive. Find the final speed of the second car
A uniform electric field of magnitude 600 N/C exists between two parallel plates that are 4.24 cm apart. Determine the distance from the positive plate at which the two pass each other. Ignore the electrical attraction between the proton and electr..
A proton is traveling at a velocity of 10^5 m/s at 45 degree up from east (among x and y axes). At this time, Fg is the gravitational force near the earth acting straight down. Specify the force in diagram (magnetic force) and i, j and k-component.
An injured monkey sits perched on a tree branch 3.0 m above the ground, while a wildlife veterinarian is kneeling down in the bushes 88.5 m away attempting to subdue the monkey with a tranquilizer gun.
A sphere of mass of m = 1.30 kg is first placed directly on the plate of an electronic scale. Calculate the density of the sphere
Red blood cells can often be charged. Consider two red blood cells with the following charges: -21.4 pC and +47.2 pC. The red blood cells are 1.72 cm apart. What is the magnitude of the force on each red blood cell
While driving on the freeway at 110 km/h, you pass a truck whose total length you estimate at 25 m. A. If it takes you, in the driver's seat, 6.0s to pass from the rear of the truck to its front, what is the truck's speed relative to the road? ..
An undersea research chamber is spherical with an external diameterof 5.80 m. evaluate the buoyant force on the chamber
A flat circular coil of 10 turns with an area of 4.4multiplied by 10-2m2 is located in a uniform magnetic field of13 mT. Initially, the magnetic flux passes through the coil perpendicularly. The coil is then rotated, in 150ms, so that its central a..
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