physics(my notes)

• SI(Systeme International d'Unites) is a decimal system in which units are divided or multiplied by 10 to give smaller or larger units.
• Length is the distance travelled by light in a vacuum during a specfic time interval.
• SI unit of length= metres(m)
• Parallax error is when u read stuff from the wrong angle and not straight
• 0.0385 has 3 significant figures. 3 is the most significant while 5 is the least.
• King = Kilometre

  Henry= Hectometre

  Died= Decametre

  Mother= Metre

  Didn't= Decimetre

  Cry= Centimetre

  Much= Milimetre
• Volume is the amount of space occupied (m^3) by a substance or object.
• Area of=

  square= s^2

  rectangle= lXb

  circle= πr^2
• volume of cylinder= πr^2h
• always measure the meniscus bottom unless its mercury
• Second is the time interval for a certain number of energy changes to occur in a caesium atom.
• Frequency= 1/tp (time period)
• tp=no. of time/ no. of ocsillation
• frequency is inversely proportional to time period
• length of pendulum= length of thread+ radius of bob by a vernoer callipers
• systematic error= scale reading+x
• tickertape timers/ dataloggers record short time intervlas in motion experiements
• Measurement by a micrometer screw gauge= shaft scale +(drum scaleX0.01mm)
• scalar had magnitude only which vector has both magnitude and direction