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The spacing of the atoms of a crystal is 159pm. A monoenergetic beam of neutrons directed normally at the surface of the crystal undergoes first order diffraction at an angle of 58 degrees from the normal.
What is the energy of each of the neutrons? (m neutron =1.675*10^-27kg, 1eV=1.6*10^-19J, h=6.626*10^-34 J*s)
Determine the magnitude of the force on an electron traveling 3.65×10^5 m/s horizontally to the east in a vertically upward magnetic field of strength 0.70 T
a merry go round (a disk I=1/2MR^2, M=500 kg, R = 1.5m) roatates at 2m/s. What is the new rotation rate for the merry go round with the child
A drug prepared for a patient is tagged with 9943Tc, which has a half-life of 6.05 h. What is the decay constant of this isotope
An 18-year-old runner can complete a 10.0 km course with an average speed of 4.38 m/s. A 50-year-old runner can cover the same distance with an average speed of 3.88 m/s. How much later (in seconds) should the younger runner start in order to fini..
A boat has a mass of 4790 kg. Its engines generate a drive force of 4350 N due west, while the wind exerts a force of 940 N due east, What is the boat's acceleration, with correct sign
Two water reservoirs are open to the atmosphere. The manometer contains mercury with the density of 13,600kg/m cubed. What is the difference in elevation if the manometer reading is 25cm.
Its market researcher begins by examining the rental markets in the Southeast, the history of apartment buildings, local economies, competitive rents, and ownership all information that was on hand and did not require any new research to locate. T..
In a common but dangerous prank, a chair is pulled away as a personis moving downward to sit on it, causing the victim to land hard onthe floor. Suppose the victim falls by 0.50 m, the mass that moves downward is 70 kg, and the collision on the fl..
a boeing 747-8 with wingspan of 65.5 m is cruising at 289 m/s over northern canada, What is the potential difference between the tips of the wings
A hydrogen atom is in the ground state. It absorbs energy and makes a transition to the n = 6 excited state.find the photon wavelengths of first and second transitions
Consider the decay: 24 Cr 55 -> 25 Mn55 + e, The Cr 55 nucleus has a mass of 54.9279 u, find the maximum kinetic energy of the emitted electrons
The centers of a 12kg lead ball and a 100g lead ball are separated by 6.0cm. What gravitational force does each exert on the other
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