The Paschen series is formed by electron transitions that
A) end on the n = 1 shell.
B) begin on the n = 1 shell.
C) end on the n = 2 shell.
D) begin on the n = 3 shell.
E) end on the n = 3 shell.
E
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A pepperoni pizza has 2.80 megacalories. Juan eats exactly 1/3 of the pizza. How many kilocalories has he consumed? (One food "calorie" is actually a kilocalorie.)
A) 930 kcal B) 933 kcal C) 933.3 kcal D) 933.33 kcal E) 933.333 kcal
If the average density of the universe is less than the critical density, the universe is open
Indicate whether the statement is true or false
An aluminum beam (E 5 72 GPa) with a square cross section and span length L 5 2.5 m is subjected to uniform load q 5 1.5 kN/m. The allowable bending stress is 60 MPa. The maximum deflection of the beam is approximately:
(A) 10 mm
(B) 16 mm
(C) 22 mm
(D) 26 mm
A diatomic molecule is vibrating in its first excited quantum state above the ground state
In that excited state, its frequency is 2.0 × 1013 Hz. What is the energy of the molecule in this state? (h = 6.626 × 10-34 J • s, h = 1.055 × 10-34 J • s, 1 eV = 1.60 × 10-19 J A) 0.041 eV B) 0.083 eV C) 0.15 eV D) 0.12 eV E) 0.17 eV