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1. Why are neutrons more widely used than protons for studying crystal structure? What about using a hydro- gen atom?
2. Why are "cold" neutrons useful for studying crystal structure? How could one obtain "cold" neutrons?
3. It has been said that many experimental discoveries are made as a result of accidents (for example, that of Davisson and Germer). This statement may have some truth, but what traits and abilities must good scientists possess to take advantage of their accidents?
There is a uniform charge distribution of lambda=7.65*10-8 C/m along a thin wire of length L=5.67 cm. compute the magnitude of the electric field at the center of the semicircle
A stereo speaker has a surface area of 0.043 m^2. The acoustic power output of the speaker is 1.7 W. Calculate the intensity of the speaker
A silver wire of diameter 1.0 mm carries a current of 140 mA. How long (on average) does it take for a conduction electron to move 1.0 cm along the wire
Three 1.5-V batteries, with internal resistances of 0.01ohms , 0.1ohms , and 1ohms , what is the voltage across each resistor
A 1.0-cm-tall object is 75 cm in front of a converging lens that has a 30 cm focal length. Calculate the image position
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.979 rad/s. Calculate the total angular momentum of the system
Why is it tiring to push hard against a solid wall? When a person pushes hard on a solid wall, is work done?
A wire is moving perpendicularly through a magnetic field of strength 0.100 T with speed 60.0 m/s. If the potential difference between the ends of the wire is 2.00 V, what is the length of the wire?
A 19.0cm × 19.0cm square loop of wire lies in the xy-plane with its bottom edge on the x-axis. What is the size of the induced current in the loop at t = 0.550s
A fireworks rocket is launched vertically into the night sky with an initial speed of 40 m/s. find the magnitude and direction of the second piece
A hollow spherical shell with mass 2.00 kg rolls without slipping down a 38.0 degree slope, find the friction force on it
The nucleus of a 125Xe atom (an isotope of the element xenon with mass 125 u) is 6.0 fm in diameter. It has 54 protons and charge q =+54e. What is the proton's acceleration
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