The energy of the ground state in the Bohr model is -13.6 eV. The energy of the n = 2 is
A)
-3.4 eV.
B)
-6.8 eV.
C)
-1.7 eV.
D)
-13.6 eV.
E)
-4.5 eV.
A
You might also like to view...
O2 is an example of
A) a molecule only B) a compound only C) both a molecule and a compound D) a collection of isolated atoms
A positively charged particle has a velocity in the negative z direction at point P. The magnetic force on the particle at this point is in the negative y direction. Which one of the following statements about the magnetic field at point P can be determined from this data?
a. Bx is positive. b. Bz is positive. c. By is negative. d. By is positive. e. Bx is negative.
A 10 kg object has a moment of inertia of 1.25 kg 
If a torque of 2.5 N•m is applied to the object, the angular acceleration is
A. 10 
B. 8.0
C. 6.0
D. 4.0
E. 2.0
If the distance between the slits and the screen is increased in Young's two-slit experiment, which one of the following statements is true of the interference pattern?
A) The distance between the minima stays the same. B) The distance between the minima decreases. C) The distance between the maxima stays the same D) The distance between the maxima increases. E) Impossible to tell without knowing the wavelength of light in use.