Auniform cylindrical steel wire (density: 7.8 x 103 kg/m3), 58.0 cm long and 1.34 mm in diameter, is fixed at both ends. to what tension must it be adjusted so that , when vibrating in its first overtone, it produces the note d-sharp of frequency 311 hz? assume that it stretches an insignificant amount. give an answer in n. pay attention to the number of significant figures.

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The energy equivalent of the rest mass of an electron is

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.