1. Answer the following questions:
- Did you get more or less nodes in with the higher frequency tuning forks? Why do you think this happens?
- Our Ventrulli tube works by applying a higher pressure at one end. This way the fluid flows towards the lower pressure. Why do you think that velocity increases with smaller diameter and increases with larger diameters? Is there something conserved?
2. True or False:
- The height of the water in the U-tube depends of the stagnation pressure (Velocity of the fluid) - True False
- The frequency of an acoustic (sound) wave depends on the wavelength and the translational speed - True False
- Buoyancy is always present when a material is dropped into a fluid (gravity is also present) - True False
- The mass of the object is equal to the mass of the displaced fluid - True False
- A larger volume of air flows through large areas than smaller areas (in our Ventrulli tube experiment) - True False
3. From the lab, you know that the speed of sound is v = 331.4 (m/s) + 0.6 (m/soC) · T, where T is the current temperature. We know that the frequency of a sound wave at 11? is 550Hz. What is the wavelength of the acoustic wave?
4. A body has a volume of 0.04m3 and an average density is 1010 kg/m3. Will the body float or sink in water? If it sinks, what is the acceleration? (Density of water is 1000 kg/m3).