For electrical safety,
a. electrical shocks caused by 1 A of current are of no concern.
b. fuses or circuit breakers are wired in series in circuits.
c. fuses larger than the rated value can be placed in a circuit.
d. fuses and circuit breakers are wired in parallel in circuits.
b
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The rule stating that the sum of two emitted frequencies in an atomic spectrum equals a third frequency is consistent with
A) momentum conservation. B) energy conservation. C) Planck's constant. D) none of the above
In a transition from one vibrational state to another, a molecule emits a photon of wavelength 5.56 µm. What is the energy difference between these two states? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 0.223 eV B) 2.23 MeV C) 13.6 eV D) 13.6 MeV E) 0.223 MeV
Muons at speed 0.9995c are sent round and round a circular storage ring of radius 550 m. If a muon at rest decays into other particles after an average T =2.2 × 10^?6 s, how many trips around the storage ring do we expect the 0.9995c muons to make before they decay?
a. 1 b. 2 c. 12 d. 6 e. 131
A 50.0-N brick has the following measures: 30.0 cm × 10.0 cm × 4.00 cm. What is the maximum pressure it can exert on a horizontal surface due to its interaction with Earth?
A) 1.25 Pa B) 12.5 Pa C) 1.25 kPa D) 12.5 kPa