The rare earth element gadolinium is ferromagnetic, and it has a saturation magnetization of 20×105 A/m at low temperatures.
(a) Calculate the number of Bohr magnetons per atom of gadolinium atom, knowing that the atomic mass is 157.2 g/mole and the density is 7.89 g/cm3.
(b) What is the average number of parallel unpaired electron spins in the 4f shell per gadolinium atom?
You might also like to view...
What is released from the proton-proton chain and is immediately absorbed by the surrounding gas, thereby heating it?
a. positrons b. gamma rays c. deuterium d. electron motion e. neutrinos
A plot of the continuous spectra of five different stars is shown in the figure. Based on these spectra, which of the stars is the hottest?
a. Star A
b. Star B
c. Star C
d. Star D
e. Star E
Lenz's Law: Two solenoids are close to each other, as shown in the figure, with the switch S open. When the switch is suddenly closed, which way will the induced current flow through the galvanometer in the left-hand solenoid?
A. from left to right B. from right to left C. There will be no induced current through the galvanometer.
Two plane mirrors are joined at a right angle. A beam of light is shone on one of the mirrors at an angle of incidence of 22 degrees, such that the reflected ray strikes the other mirror. What is the angle of incidence for the beam that strikes the second mirror?
A. 
B. 
C. 
D. 