UNIT 01

• Electric Current


  Ampere (A)
• Temperature


  Kelvin (K)
• Amount of Substance


  mole (mol)
• Luminous Intensity


  candela (cd)
• tera (T) - 10^12
• Prefixes are used to denote powers of ten, making it easier to express very large or very small quantities
• • Classical Mechanics-study the motion of bodies according to Newton’s laws of motion.
• • Quantum mechanics-describes the peculiar motion of very small bodies(atomic sizes)
• 1. Optics - the study of light
• 1. Acoustic -study of sound
• 1. Thermodynamics and statistical mechanics- the study of heat
• 1. Solid -study of solids-most often crystalline metals
• PHYSICAL QUANTITY- property of a material or system that can be measured or calculated.
• BASE UNITS- units from which all other units are derived.
• • Length(Meter)1m is defined as the distance traveled by light in a vacuum in 1/299,792,458 seconds.
• Time (second)- 1 second is defined as 9, 192,631,770 cycles of microwave radiation due to the transition between the two lowest states of the cesium atom.
• Giga (G) - 10^9
• mega (M) - 10^6
• • kilo (k) - 10^3
• deci (d) - 10^-1
• centi (c) - 10^-2
• Mili (m) - 10^-3
• micro (myu) - 10^-6
• nano (n) - 10^-9
• pico (p) - 10^-12