Scientific Notation The speed of light in vacuum c≈300000000m/s c≈3.0X108m/s The app mass of a mosquito m≈0.00001kg m≈105kg Physics 121: Lecture 1, Pg 11
Physics 121: Lecture 1, Pg 11 Scientific Notation The speed of light in vacuum c 300 000 000 m/s c 3.0 x 108 m/s The app. mass of a mosquito m 0.00001 kg m 10-5 kg
Algebra Basic rules 8X=32 8x8=328 X=4 2=8 X+2-2=8-2 X=6 Physics 121: Lecture 1, Pg 12
Physics 121: Lecture 1, Pg 12 Algebra Basic Rules 8x =32 8x/8 = 32/8 x = 4 x + 2 = 8 x + 2 - 2 = 8 – 2 x = 6
Basic rules Multiplying (a/b)(cld) =(ac)/(bd) Dividing (ab)/(c/d)=(ad)/(bC) Adding a/b±cd=(ad±bc)(bd) Factoring ax+ ay+az= a(x+y+z) a2+2ab+b2=(a+b) a2-b2=(a+b)(a-b) Physics 121: Lecture 1, Pg 13
Physics 121: Lecture 1, Pg 13 Basic Rules Multiplying: (a/b)(c/d) = (ac)/(bd) Dividing: (a/b)/(c/d) = (ad)/(bc) Adding: a/b ± c/d = (ad ± bc)/(bd) Factoring: ax + ay + az = a(x + y +z) a 2 + 2ab + b2 = (a + b)2 a 2 - b 2 = (a + b)(a –b)