A hydrogen atom in the ground state absorbs a 12.75-eV photon. To what level is the electron promoted? (The ionization energy of hydrogen is 13.6 eV)
a. n = 2
c. n = 5
b. n = 3
d. n = 4
D
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Glycerin at 30 
has a density of 1,260 
and a viscosity of 0.630 Pa-s. The glycerin is poured through a funnel with a neck that is 10.0 cm long and 1.00 cm in diameter. If the level of glycerin is kept at a level 5.00 cm above the neck, then what is the flow rate of the glycerin through the funnel?
A. 
B. 
C. 
D. 
E. 
The half life of uranium-232 is 70 years. The time for 3/4 of a sample of uranium-232 to decay is 105 years
Indicate whether the statement is true or false
Three 2.50-?C charges are placed on tiny conducting spheres at the ends of 1.00 m-long strings that are connected at 120° angles as shown below. The magnitude, in N, of the tension in any one of the strings is
?
?
A. 1.88 × 10?2. B. 3.25 × 10?2. C. 3.75 × 10?2. D. 6.50 × 10?2. E. 7.50 × 10?2.
Quantum uncertainties are most predominant for simultaneously measuring the speed and location of
A) a baseball. B) a spitball. C) an electron. D) none of the above