The nearest star is 1 ly from the solar system
a. True
b. False
Indicate whether the statement is true or false
Ans: False
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Thin Films: A 360-nm thick oil film floats on the surface of a pool of water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. When the surface of the oil is illuminated from above at normal incidence with white light, what is the wavelength of light between 400 nm to 800 nm wavelength that is most weakly reflected?
A. 520 nm B. 540 nm C. 560 nm D. 580 nm E. 600 nm
Power: A certain ac signal at 1000 Hz is applied across an inductor and a 100-? resistor. If the power factor of the circuit is 0.400, what is the impedance of this circuit?
A. 150 ? B. 200 ? C. 250 ? D. 100 ? E. 300 ?
In a nuclear reactor, the control rods must be able to
A) absorb neutrons. B) absorb 235U. C) slow neutrons down without absorbing them. D) remove the heat from the fissioning uranium. E) absorb 238U.
A pendulum that was originally erected by Foucault at the Pantheon in Paris for the Paris Exhibition in 1851 was restored in 1995. It has a 28.0-kg sphere suspended from a 67.0-m light cable
How long would it take for the bob in this pendulum to move from the position of maximum displacement down to the equilibrium point? A) 4.11 s B) 21.5 s C) 2.58 s D) 32.2 s E) 42.9 s