The rate of vibration of a string under constant tension, r cm/s, varies inversely with the length of the string, l cm. When the string is 17 mm long, the rate of vibration is 413 cm/s. Write an equation that describes the rate of vibration of a string in terms of the length of the string.

An equinox occurs when a. neither end of earth's axis is tilted toward or away from the sun. b. the north end of earth's axis is tilted away from the sun. c. the north end of earth's axis is tilted toward the sun. d. earth's axis is parallel to the sun's rays. select the best answer from the choices provided a b c d

Compare the horizontal displacement of the two balls as they travel to the ground. what do you observe?

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?