If you are in the Moon's umbral shadow, then you will witness
A) nighttime.
B) a total solar eclipse.
C) a total lunar eclipse.
D) a partial solar eclipse.
E) some kind of lunar eclipse.
B
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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 observer is traveling at a velocity of 24.00 m/s toward the stationary ambulance, then what is the frequency of the siren perceived by the observer?
A. 2,657 Hz B. 2,567 Hz C. 2,532 Hz D. 2,500 Hz E. 2,479 Hz
Does a magnetic field exert a force on a stationary object?
1.yes 2.no
Does an electric field exert a force on a straight current-carrying wire? Assume the current is along the x axis and field is in the y direction
1.yes 2.no
Index of Refraction: Light having a frequency in vacuum of 6.0 × 1014 Hz enters a liquid of refractive index 2.0. What is the frequency of the light in this liquid? (c = 3.0 × 108 m/s)
A. 12 × 1014 Hz B. 6.0 × 1014 Hz C. 3.0 × 1014 Hz D. 1.5 × 1014 Hz E. 2.0 × 1014 Hz