The diffraction-limited resolution of a 10-meter telescope is about 0.01 arcsecond for visible light
Would you expect the actual angular resolution of a Keck 10-meter telescope in Hawaii to be better than, equal to, or worse than 0.01 arcsecond? Explain.
It would be worse than 0.01 arcsecond because of the distortion caused by atmospheric turbulence.
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Mercury has a weak magnetic field because of its iron core
a. True b. False Indicate whether the statement is true or false
A man is moving by you at a speed close to the speed of light. Which of the following correctly summarizes the effects you would notice on his mass, size, and time?
A) His mass would be increased from its value at rest, his length would be decreased from its rest value but only in the direction in which he is moving, and his time would be running slower than yours. B) His mass would be increased from its value at rest, his length, width, and height would all be decreased no matter what direction he is moving, and his time would be running slower than yours. C) His mass would be decreased from its value at rest, his length would be decreased from its rest value but only in the direction in which he is moving, and his time would be running slower than yours. D) His mass would be increased from its value at rest, his size would be increased, and his time would be running slower than yours.
What is the energy of a photon that has the same wavelength as an electron with energy 
J?
A. 10.0 keV B. 101 keV C. 55.3 keV D. 5.53 keV E. 6.77 keV
A 30-?F capacitor is charged to an unknown potential V0 and then connected across an initially uncharged 10-?F capacitor. If the final potential difference across the 10-?F capacitor is 20 V, determine V0
a. 13 V b. 27 V c. 20 V d. 29 V e. 60 V