Question

20.) A 10.0 kg mass is attached to the end of a 2.00 m long brass rod, which has a diameter of 1.00 mm and negligible mass. The mass at the end is pulled, stretching the rod slightly, and then released. If the elastic modulus of brass is 9.10 × 1010 N/m2, then the frequency of the resulting oscillations is. ___Hz

19.) A U-shaped manometer, filled with a liquid of unknown density, is connected on one side to a vessel containing gas at gauge pressure 10.0 kPa, and the other side is open to the atmosphere (pressure 101.3 kPa). The level of the liquid in the side connected to the gas vessel is lower than on the open side. The difference in height between the two sides is 10 cm. What is the density of the liquid in the manometer? ___ kg/m^3

17.) A 1.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. If the initial velocity is 4.00 cm/s and the initial displacement is 0.00 cm, then what is the amplitude of the oscillations? ___cm

13.) A wire is 12.00 m long and has a diameter of 1.50 mm. The elastic modulus of the wire is 7.00 × 10¹⁰ N/m². If a force of 500 N is applied to end of the wire, then the increase in length of the wire is ___mm

Answer 1