An ambulance is generating a siren sound at a frequency of 2,400 Hz. The velocity of sound is 345.0 m/s. If the ambulance is traveling at a velocity of 24.00 m/s toward the stationary observer, then what is the frequency of the siren perceived by the observer?
A. 2,579 Hz
B. 2,540 Hz
C. 2,525 Hz
D. 2,500 Hz
E. 2,480 Hz
A. 2,579 Hz
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A) 2.8 N. B) 2.3 N. C) 1.8 N. D) 3.4 N. E) 3.9 N.
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A. 1.0 N B. 5.0 N C. 2.0 N D. 3.6 N E. 3.0 N
Exclusion Principle: What is the correct ground state electron configuration of boron, which has 5 electrons?
A. 1s2 2s2 2p B. 1s2 2s2 2p3 C. 1s2 1p2 2s D. 1s2 2p2 3s E. 1s2 2p3
A 2.0-C charge moves with a velocity of 
m/s and experiences a magnetic force of 
N. The x component of the magnetic field is equal to zero. Determine the y component of the magnetic field.
A. ?3.0 T B. +3.0 T C. +5.0 T D. ?5.0 T E. +6.0 T