One of the emission lines described by the original version of Balmer's formula has wavelength 377nm. What is the value of n in Balmer's formula that gives this emission line?
A) 11
B) 12
C) 13
D) 14
A
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Suppose the circuit parameters in a series RLC circuit are: L = 1.00 ?H, C = 10.0 nF, R = 100 ?, and the source voltage is 220 V. Determine the resonant frequency of the circuit and the amplitude of the current at resonance.
What will be an ideal response?
If a galaxy is located at a distance of 18 Mpc and is found to have recessional velocity of 1170 km/s, what is Hubble's constant based only on this galaxy?
a. 65 km/s b. 75 km/s c. 55 km/s d. 85 km/s e. 95 km/s
Non-conservative forces can change the mechanical energy of a system
Indicate whether the statement is true or false
The arrow in the photo on the left points to the location of the star that has exploded as a supernova in the photo on the right. Suppose you had looked with your naked eye at the supernova on the night it was photographed in the "during/after" photo. Assuming that it was bright enough to see (it was), what would it have looked like to your naked eye?
A) like a single star in the night sky B) like a huge white blob, about the angular size of the full Moon but not quite as bright C) like a reddish cloud spread out over a region of the sky about half the angular size of the full moon D) like a pulsating bright light, dimming and brightening about every 5 minutes