According to Lenz's law, the induced current in a circuit always flows to oppose the external magnetic field through the circuit
A) True B) False
B
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Chloroplasts are found in the cells of which of the following organisms?
a. Clams b. Tulips c. Parrots d. Starfish
What was the "solar neutrino puzzle"?
A. Neutrinos from the Sun were spontaneously changing into unexpected types. B. Neutrinos fired at the Sun's core were not reflecting properly back to Earth. C. Particle accelerators on Earth were interfering with the Sun's core. D. The sun did not produce any neutrinos, indicating it cannot be powered by fusion. E. The Sun's core was producing too many neutrinos.
Light in a transparent material (index of refraction 1.333 ) strikes the boundary with another transparent material (n = 1.010)
(a) What is the critical angle for total internal reflection? (b) By what percent does the wavelength change going from the 1st to the 2nd material?
Jane drove her car from Columbus, Ohio to
Cleveland, Ohio. She traveled a total distance of 140 mi in 2.8 hours. Her average speed was a) 50 mi/h b) 0.02 mi/h c) 56 mi/h d) 350 mi/h