out of мiŋd: Physic Chapter 1.1-1.2❤

Jan 8, 2012

Physic Chapter 1.1-1.2❤

1.1 Understanding Physics





Physics是从Science里分出来的,也是一样让我们明白关于自然现象,各种物质的属性还有能源。都是在关于我们四周围的东西。


Physics这个字源自于Latin→physica (The Science of Natural Things)
19世纪的时候ho..Physics是被称为Natural Philosophy   

Fields of Study in Physics (textbook:PG 3)

  • Forces and motion(关于力度的研究)
  • Heat(关于探讨热能对不同的物质的影响)
  • Light(关于解释因为光而有不同的天然气象)
  • Waves(关于明白不同种的波的属性和它们的用处)
  • Eletricity and electromagnetism(关于研究电和磁场之间的互动)
  • Electronics(关于研究在各种行业电器的用处)
  • Nuclear physics(关于核子的构造和他们的工具)
1.2 Understanding Base Quantities and Derived Quantities


Murny是一个运动员,当我们在问Murny可以跑多快时或问大象有多重,其实我们就已经正在使用Physical Quantities了。

Physical Quantities是quantities that can be measured.
我们可以用symbol来代替Physical Quantity ,numerical values代替magnitude和unit of measurement.

Physical Quantities分为两种

  • Base quantities =
 Physical quantities that cannot be define in terms of other quantities
  • Derived quantities = 
physical quantities derived from multiplication or division or both multiplication and division.

那天老师教的,我现在复习好啦!! 迟了,去睡觉了,晚安:)




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