1. In a liquid with density 1300 kg/m3 , longitudinal waves with frequency 400 Hz are found to have wavelength 8.00 m. Calculate the bulk modulus of the liquid.
2. A metal bar with a length of 1.50 m has density 6400 kg/m3 . Longitudinal sound waves take 3.90×10−4 s to travel from one end of the bar to the other. What is Young's modulus for this metal?