Review, Final

Post date: Jan 21, 2009 2:24:29 PM

The final covers 9 chapters, in various detail according to how much time was spent on each unit.

- Ch. 7 - 2D Motion
  - Use accelerated motion equations
  - Apply to one dimension (horizontal or vertical) at a time
  - Split vectors into components before beginning
  - Use special equations where applicable
  - Draw and write out all variables if stuck
- Ch. 9 - Momentum
  - Draw before and after collision
  - Total momentum is conserved, but momentum of individuals in a system may change
- Ch. 10 - Work, energy, and simple machines
  - Out means the machine does that work or applies that force
  - In means the person using the machine does that work or applies that force
  - efficiency is ALWAYS less than 100%
- Ch. 11 - Energy
  - Energy is conserved, but may change forms or be transferred between objects in a system
  - Draw situations to help determine what type(s) of energy an object has
- Ch. 14 - Waves
  - Remember, T is the period in seconds, f is the frequency in Hertz
  - Wavelength is the distance before a wave repeats (peak to peak, trough to trough)
- Ch. 15 - Sound
  - In speed equation for sound, T is the temp in degrees Celcius
  - If given the beat frequency and one other frequency, there are two possible frequencies for the seconds frequency (one higher and one lower than the first frequency)
- Ch. 16 - Light
  - Careful with the prefixes!
- Ch. 17 - Reflection and Refraction
  - In Snell's Law, it doesn't matter which is n1 and which is n2, as long as you're consistent
  - For the critical angle equation, if you get n1 and n2 mixed up you'll get an error
  - All materials (other than a vacuum) have n values greater than 1
- Ch. 19 - Diffraction and Interference
  - x is the distance from the central peak to the next bright spot in an interference pattern
  - Be sure that all distances are in the same units!