Physics

Physics

1. Therometers and expanding gases

   • a liquid which is sensitive to change colours and expand
   • the sensitive one are ones that show big change which are actually small changes
   • Theses are to measure you body and the environment which surrounds you

2. Wave properties

   • all waves transfer energy but without a mass
   • transverse waves
     • they oscillate at a right angle to the direction were travelling
     • Transfers waves are waves in the sea and sound waves
   • longitude waves
     • they oscillate in the direction of travel
   • Reflection waves
     • Theses are waves that Can be reflected of hard surfaces

3. electromotive force

   • this a voltage supply and therefore it is measured in volts

4. resistance

   • this is a measure of how diffcult it is for electrical charge to flow around a circuit
   • resistance is a measure in ohms

5. how to test you hearing

   • you uses a thing called a oscilloscope this produces high and low sounds
   • At brith the human hearing range goes from 20H to 20,000H

6. Background radiation

   • Background radiation can come from rocks food cosmic rays and radon gas

7. Atoms have electrons neurones and protons

   • Protons have a positive charge and neutrons have neutral charge and electrons have a negative charge