home made

• longitudinal 


  oscillations are parallel to direction travel
• transverse


  oscillations are perpendicular to direction of travel (up and down)
• vector quantity 


  magnitude and direction
• scalar quantity


  only magnitude
• types of forces

  contact and non contact
• equilibrium

  forces are balanced
• pressure


  force per unit area
• moment


  turning effect of a force
• speed of sound

  330 m/s
• why does an object float

  weight = upthrust
• speed of light

  3 x 10^8
• amplitude


  maximum displacement on the point of the wave from its undisturbed position
• wavelength 


  distance between the same point on two adjacent waves
• frequency 


  number of complete waves passing a certain point per second (Hz)
• period 


  amount of time it takes for a full cycle of the wave to pass a point