2nd science pt

• Magnitude


  is the numerical value and standard unit
• What is thermal enerrgy

  The total kinetic energy of the particles in a substance. Thy move faster in higher temps aand slower in lower
• What is static electricity


  Is the result of an imbalance between negative and positive charges in an object
• who discovered static electricity

  thales of miletus
• it is the measure of the objects hotness or coldness

  temperature
• quantities that are expressed by magnitude alone

  Scalar quantity
• vector quantities


  are quantities expressed by magnitude with corresponding direction
• What is the boling point in celsius?

  100C
• Absolute zero of celsius

  273.15C
• who discovered the electroscope

  william gilbert
• benjamin franklin conducted what experiment?

  the kite experiment
• 5m is


  scalar quantity
• 30m\sec east is


  vector quantity
• total ground covered


  distance
• length between starting point to end point

  displacement
• transfer of electrons from one uncharged object to another by rubbing


  charging by friction
• example of friction


  hair and balloon
• Thermal energy that flows between bodies or regions due to temperature difference

  Heat
• transfer of heat by direct contact

  conduction
• charging by conduction


  transferring charges from a charged to neutral body
• convection


  transfer of heat thru actual physical movement of fluid
• materials that allow charges to move easily thru them

  Conductors
• charging method that charges an object without actually touching the object to any other charged object

  charging by induction
• transfer of heat thru waves

  radiation
• example of radiation


  microwaving your food
• example of convection 


  hot air balloon is being raisd by the hot gas from the fire
• example of conduction


  using a metal stick thru the fire which transfers the heat from the stick to ur hand
• material thru which a charge cannot move easily

  insulator
• proton + attracts electron -
• same forces repel
• system in an electtrical network as a safety measure to protect human life and equipment

  earthing/grounding system
• whats the importance of earthing system

  to provide an alernative path dor dangerous currents to flow so that accidents due to electric shock and damage can be avoided
• juana travelled 20km and drove back 5km. the journey took 2 hours to complete, find the total distance travelled.

  25km