DERIVED UNITS:
Area:
→ A barn unit is a unit of area used to express the cross-sectional area of nuclei and nuclear reactions.
→ 1 barn = 10-28 m2
Volume:
→ SI unit of volume is cubic meter or meter3.
→ The unit of volume in CGS system is cm3.
→ Volume of liquids expressed in liter(L), milliliter(ml), gallon, TMC etc.
→ Barrel is a unit of measurement used to quantify the volume of oil.
→ 1 barrel = approximately 159 liters (exactly 158.987 liters).
→ 1 US gallon = 3.785 liters (approximately).
→ 1 Imperial gallon = 4.546 liters (approximately).
→ 1 TMC (Thousand Million Cubic feet) = 28.317 × 109 liters.
Specific volume:
→ Specific volume is the reciprocal of mass density.
→ SI unit of specific volume is m3/kg.
→ The product of specific volume and density is 1.
→ The dimensional formula of specific volume is L3 M-1 T0.
Speed:
→
→
→ The SI unit of speed is m/s.
→ The dimensional formula of speed is M0 L T-1.
→ Knot is the unit of speed (used to measure the speed of ships and aircrafts).
→ 1 knot = 1 nautical mile per hour = 1.852 km/h.
→ The unit nautical mile per hour is referred to as a knot.
→ The unit nautical mile per hour is used to measure the speed of ships and aircrafts.
Velocity:
→ The rate of change of displacement with time is called as velocity.
→
→ SI unit of velocity is m/s.
→ The dimensional formula of velocity is L T-1.
Angular velocity:
→ The SI unit of angular velocity is radian per second.
→ The dimensional formula of angular velocity is T-1.
Acceleration:
→ The rate of change of velocity of an object with respect to time is called acceleration.
→
→ The SI unit of acceleration is m/s2 or m s-2.
→ The dimensional formula of acceleration is L T-2.
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