Consider the Bohr model for the hydrogen atom in its second excited state
(a) Determine the binding energy (eV) of the electron.
(b) What is the radius of the electron orbit, given that r1 = 0.0529 nm?
(c) How far is it from the next higher excited orbit?
(a) 1.51 eV (b) 0.476 nm (c) 0.370 nm
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The heat of fusion for silver at 960.8
is 88.3 kJ/kg and the specific heat of silver is 0.235 kJ/kg 
What is the energy needed to melt 100 grams of silver starting at 0
?
A. 40.5 kJ B. 31.4 kJ C. 25.4 kJ D. 19.5 kJ E. 13.7 kJ
The Earth is 1.49 × 10^11 meters from the sun. If the solar radiation at the top of the Earth's atmosphere is 1 340 W/m2, what is the total power output of the sun?
a. 7.10 × 10^27 W b. 2.20 × 10^30 W c. 6.62 × 10^26 W d. 3.74 × 10^26 W e. 2.98 × 10^25 W
The portion of the atmosphere that filters out 95 percent of the incident UV radiation is the
A) ozone layer. B) stratosphere. C) troposphere. D) aerosol layer. E) particulates.
The outer core is
A) rock. B) plastic. C) liquid. D) the source for volcanoes.