Physics, 17.02.2020 22:19 Esmer1030

What is a constellation as astronomers define it today? What does it mean when an astronomer says, "I saw a comet in Capricorn last night?"

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Physics, 22.06.2019 14:30, sross8799

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Physics, 23.06.2019 01:00, star296

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Physics, 23.06.2019 02:30, lmcginnis2003

Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excesselectrons is typical. what is the magnitude of the electric forceon a protein with this charge in a 1500 n/c electric field?

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Physics, 23.06.2019 06:00, silviamgarcia

The frequency of a tuning fork can be found by the method shown. a long tube open at both ends is submerged in a beaker of water, and the vibrating tuning fork is placed near the top of the tube. the length l of the air column is adjusted by moving the tube vertically. the sound waves generated by the fork are reinforced when the length of the air column corresponds to one of the resonant frequencies of the tube. the smallest value for l for which a peak occurs in sound intensity is 7 cm. l what is the frequency of the tuning fork? the speed of sound in air is 345 m/s. answer in units of hz

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What is a constellation as astronomers define it today? What does it mean when an astronomer says, "...