When TOTAL REFLECTION occurs at a surface, the incident angle must be in the substance with the higher
A) speed of light.
B) index of refraction.
C) incident angle.
D) c/n.
B
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Two long parallel wires placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you
From your point of view, the magnetic field at the point exactly midway between the two wires A) points upward. B) points downward. C) points toward you. D) points away from you. E) is zero.
Standing Waves on a String: A 25-g string is stretched with a tension of 43 N between two fixed points 12 m apart. What is the frequency of the second harmonic?
A. 6.0 Hz B. 12 Hz C. 18 Hz D. 24 Hz E. 36 Hz
In radioactive decay, the original nucleus before decay is referred to as the
A) daughter isotope B) parent isotope C) mother-in-law isotope D) progenitor isotope
The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel be displaced from its original position after 6.0 s?
A) 21. radians B) 7.3 × 102 radians C) 1.2 × 102 ° D) 0.32 revolutions E) 7.3 × 10-2 revolutions