In state n = 1, the energy of the hydrogen atom is -13.58 eV. What is its energy in state n = 2?
A) -13.58 eV
B) -6.79 eV
C) -4.53 eV
D) -3.40 eV
E) -1.51 eV
D
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A 4.0-kg mass is placed at (3.0, 4.0) m, and a 7.0-kg mass is placed at (3.0, -4.0) m. What is the moment of inertia of this system of masses about the x axis?
a. 275 kg•m2
b. 90 kg•m2
c. 176 kg•m2
d. 99 kg•m2
The conversion of mass to energy of other forms via nuclear fission is
A) less than 1%. B) about 10%. C) about 20%. D) about 30%. E) more than 30%.
If two parallel, conducting plates have equal positive charge, the electric field lines will:
a. leave one plate and go straight to the other plate. b. leave both plates and go to infinity. c. enter both plates from infinity. d. none of the above.
In each of the following situations, point charge q moves in a uniform magnetic field B. The strength of the magnetic field is indicated by the density of field lines. In each situation, the initial speed v of the charge is the same. For which situation(s) will the charge q travel the longest distance in a certain time T?
1.1
2.2
3.3
4.4
5.5
6.1 & 3
7.2 & 4
8.1, 2, 3 & 4
9.1, 2, 3, 4 & 5
10.Cannot be determined