What is the phase angle in a series RLC circuit at resonance?
1.180°
2.90°
3.0
4.-90°
5.None of these answers is necessarily correct.
3
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Visible light consists of electromagnetic waves with wavelengths (in air) in the range 400 - 700 nm. What are the frequencies of visible light?
a. 
b. 
c. 
d. 
A beam of neutrons (m = 939.6 MeV/c2) of momentum 12 keV is passed through a single slit of width 0.10 nm. As a result of this, the neutron beam acquires an uncertainty in the component of the momentum that is transverse to the beam direction. If the distance between the slit and a projection screen onto which the neutrons are projected is 1.5 m, what is the expected width of the neutron distribution on the projection screen in the transverse direction?
A. 155 cm B. 12 cm C. 25 cm D. 50 cm
Order the materials from smallest refractive index to largest refractive index.
=Air =Diamond =Glass =Quartz =Water
A uniform electric field has a magnitude of 10 N/C and is directed upward. A charge brought into the field experiences a force of 2.0 N upward. The charge must be
A. +20 C. B. -2.0 C. C. -20 C. D. -0.2 C. E. +0.2 C.