A Li2+ ion undergoes a transition from the n = 4 to the n = 3 state. The energy of the emitted photon is
a. 4.5 eV
b. 10.2 eV
c. 5.95 eV
d. 2.6 eV
e. 0.66 eV
c
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Answer the following statement(s) true (T) or false (F)
1. Consider two q-vectors 
with possibly complex components. Their inner product 
is a real number.
2. The inner product of a vector with itself 
is a real number.
3. Consider two q-vectors 
with possibly complex components. Their inner product 
obeys the relation = 
4. Even though the observable Sy can only have the values 
, the expectation value 
can have any value between these two extremes.
In the Rutherford model of the hydrogen atom, a proton (mass M, charge Q) is the nucleus and an electron (mass m, charge q) moves around the proton in a circle of radius r. Let k denote the Coulomb force constant (1/4??0) and G the universal gravitational constant. The ratio of the electrostatic force to the gravitational force between electron and proton is:
A) kQq/GMmr2 B) GQq/kMm C) kMm/GQq D) GMm/kQq E) kQq/GMm
A heater is rated at 1200 watts for a 120-volt source.The current drawn by the heater is 10 amperes
a. True b. False Indicate whether the statement is true or false
A 5.00-m-long uniform ladder, weighing 200 N, rests against a smooth vertical wall with its base on a horizontal rough floor, a distance of 1.20 m away from the wall. The coefficient of static friction between the ladder and the floor is 0.200
How far up the ladder, measured along the ladder, can a 600-N person climb before the ladder begins to slip? A) 1.50 m B) 1.26 m C) 1.05 m D) 3.95 m E) 4.56 m