Zusammenfassung der Ressource
Exam 3
- Chap. 10
- Fluids
- Pressure in a fluid is connected with the force that the fluid exerts on a particular surface.
- Force is applied in all directions
- Archimedes Principal
- The upward buoyant force that is exerted on a body immersed in a fluid, whether fully or partially submerged, is equal to the weight of the fluid that the body displaces.
- Density is mass per unit volume
- Flow rate on the left must equal flow rate on the right
- flow rate is the product of area and speed or volume divided by time.
- bernoulli's equation
- relation between pressure speed and energy
- Chapter 11
- harmonic motion and elasticity
- an object moves over the same path periodically
- requires velocity and displacement
- linear frequency is in Hertz
- Peak displacement from the equilibrium point is amplitude.
- Displacement= 0, then Velocity= Max
- Velocity= 0 Acceleration= Max (Extreme)
- Period is time it takes to go through one complete cycle
- Frequency is the number of oscillations per unit of time.
- Simple harmonic oscillators
- amplitude is the maximum displacement of the spring from its place of rest
- Hooke's law
- young's modulus characterizes the stiffness of the material
- stress is force over an area
- strain is change in length divided by the original length
- The comparison of stress, strain, and young's modulus
- shear modulus s in pascals
- Replaces young's modulus in hooke's law
- Volume deformations
- change in pressure is equal to a negative bulk modulus times the change in volume divided by the original volume
- Chapter 12
- Waves
- the moving disturbance that transports energy from one place to another without transporting matter
- Waves move through a medium
- Transverse waves
- Perpendicular movement to the direction of propagation
- longitudinal waves
- Paralell movement to the direction of propagation
- crest is the highest point on a wave, whereas the trough is the bottom
- Wavelength is the constant repeat distance of the wave
- periodic waves have a repeat time and repeat distance