Physics

Physics

1. Hooke's Law

   • F=Kx
   • Extension is proportional to force applied

2. WAVES

   • Transverse
     • Water,light, em spectrum, seismic secondary waves
     • Displacement is at right angles to wave travel.
   • Longitudinal
     • Displacement is parellel to direction of waves travel.
     • Sound waves and seismic primary waves.

3. SOUND

   • Travels faster in a solid than gas as it is more dense.
   • Sound waves are longitudinal and particles move back and forth parelell to direction of waves travel.

4. REFLECTION

   • ANGLE OF INCIDENT=ANGLE OF REFLECTION

5. SATELLITES

   • GEOSTATIONARY
     • Communication and satnav
       • Stays over the same spot, moves with the earth.
   • POLAR
     • Observation and weather (mapping and spying)
       • Moves around the earth pole to pole about every 2 hours.

6. STARS

   • The universe is a large collection of billions of galaxies.
     • A galaxy is a large collection of billions of stars.
       • We are in the MILKY WAY

7. DEFENITIONS

   • Frequency is the number of waves that passes a point over a time. Measured in Hertz
   • Wavelength is the distance between 2 consecutive points on the wave, measured in meters.
   • Amplitude is half the height of the wave. More amplitude = more energy! Measured in meters.

8. ORBITS

   • Orbital speed =2 pie r / time

9. EQUATION

   • Wave speed=frequency x wavelength

10. Experiment to determine gfs

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