When a nucleus in an excited state decays to the ground state, the particle emitted is a(n)
a. alpha particle
b. beta particle
c. gamma ray
d. x ray
e. none of the above
C
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The saturation magnetization of nickel measured at room temperature is 5.1×105 A/m.
(a) Calculate the average number of Bohr magnetons on a nickel atom, knowing that nickel has an FCC structure with an atom at 0,0,0. At room temperature the lattice parameter is 0.352 nm. (b) Compare your answer to part (a) with the theoretical number of Bohr magnetons based upon the atomic electron structure of nickel, and explain any possible difference.
Coulomb's Law: Three point charges are located on the x-axis at the following positions: Q1 = +2.00 ?C is at x = 1.00 m, Q2 = +3.00 ?C is at x = 0.00, and Q3 = -5.00 ?C is at x = -1.00 m. What is the magnitude of the electric force on Q2? (k = 1/4??0 = 8.99 × 109 N ? m2/C2)
A. 0.0540 N B. 0.135 N C. 0.158 N D. 0.0810 N E. 0.189 N
A projectile is projected from the origin with a velocity of 30.0 m/s at an angle of 40.0 degrees above the horizontal. What is the time it takes the projectile to reach maximum height?
A. 2.66 s B. 2.23 s C. 1.97 s D. 1.54 s E. 1.02 s
What age would radiometric dating give for a chunk of recently solidified lava from Kilauea, an active volcano in Hawaii?
a. zero years b. the age of Earth c. the age of the universe b. the age of the solar system