How many miles can you move a disk
Astronomers are proud of their telescopes and often say they "resolve a dime at so many miles." How many miles can you move a disk (D=3 cm) froma 148 cm diameter telescope mirror and just resolve it using light of wavelength 553nm?
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A transformer has 355 turns in the primary coil and 197 in the secondary coil. By what factor does it change the voltage?
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