What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 8 jumps to the final state nf = 2?
A) 205.1 nm
B) 104.0 nm
C) 388.8 nm
D) 486.2 nm
E) 610.0 nm
C
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Molar Specific Heats: A certain ideal gas has a molar specific heat at constant pressure of 33.2 J/mol ? K. Its molar specific heat at constant volume is closest to which of the following values? (R = 8.31J/mol ? K)
A. 41.9 J/mol ? K B. 16.6 J/mol ? K C. 25.1 J/mol ? K D. 24.9 J/mol ? K E. 49.8 J/mol ? K
Impedance: In a series RLC ac circuit, a second resistor is connected in series with the resistor previously in the circuit. As a result of this change, what happens to the impedance of the circuit?
A. It increases. B. It decreases. C. It does not change. D. It increases for frequencies below resonance and decreases for frequencies above resonance. E. It decreases for frequencies below resonance and increases for frequencies above resonance.
Light bulb A is rated at 60 W and light bulb B is rated at 100 W. Both are designed to operate at 110 V. Which statement is correct?
a. The 60 W bulb has a greater resistance and greater current than the 100 W bulb. b. The 60 W bulb has a greater resistance and smaller current than the 100 W bulb. c. The 60 W bulb has a smaller resistance and smaller current than the 100 W bulb. d. The 60 W bulb has a smaller resistance and greater current than the 100 W bulb. e. We need to know the resistivities of the filaments to answer this question.
In the vacuum of outer space far from our Sun, there is no
A) gravity. B) atmospheric pressure. C) both of these D) none of the above