Atypical human vocal cord has a mass of about 5.0 g and a length of about 1.5 cm. how much tension must a muscle exert on a vocal cord to produce a sound vibration of 120 hz? (assume that this is the fundamental frequency of the vocal cord.)

Which of the following changes to a pipe would increase the conductance by a factor of 12? 1.quadrupling the length and tripling the radius.2.reducing the length by a factor of and doubling the radius.3.tripling the length and reducing the radius by a factor of .4.reducing the length but a factor of and doubling the radius.

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Could someone . i have tried to solve myself but my calculation is off