Quarks are bound together in hadrons by
a. the strong force c. intermediate (or gauge) bosons
b. the weak force d. the color force
D
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If an AC circuit consists of a 220 mH inductor in series with a 75 k
resistor and an AC generator with rms voltage of 12 V. If the frequency of the generator is 25 kHz, what is the rms voltage drop across the resistor?
A. 7.0 V B. 9.4 V C. 2.6 V D. 5.0 V
A string with a fixed frequency vibrator at one end is undergoing resonance with 4 antinodes when under tension T1 . When the tension is slowly increased the resonance condition disappears until tension T2 is reached, there being no resonances occurring between these two tensions. How many antinodes are there in this new resonance?
a. 3 b. 4, since all resonances in this situation have the same number of nodes c. 5 d. 2, since resonances only involve whole wavelengths e. 6, since resonances only involve whole wavelength
The unified model describes active galactic nuclei using
a. a super massive black hole at the center of a normal spiral galaxy. b. a super massive black hole surrounded by an accretion disk and dense disk of gas. c. an accretion disk around a neutron star. d. gravitational lenses to intensify the radiation coming from them. e. different lines of sight toward and dwarf irregular galaxy.
If 500 electrons are placed on a conducting sphere of radius 10
m, what is the potential at its surface?
A. 100 V B. -10,000 V C. 32 V D. -72 mV E. -72 V