UnitsOfMeasurementSystemsOfUnitsSiUnitsFundamentalByProfSanjeevSanghi
Units of Measurement

Length:
 1 meter (m) = 100 centimeters (cm)
 1 meter (m) = 1000 millimeters (mm)

Mass:
 1 kilogram (kg) = 1000 grams (g)

Time:
 1 second (s) = 1000 milliseconds (ms)

Area:
 Area of a rectangle = Length × Width

Volume:
 Volume of a cube = Side³
 Volume of a cylinder = πr²h
SI Units
 Length: Meter (m)
 Mass: Kilogram (kg)
 Time: Second (s)
 Temperature: Kelvin (K)
 Electric Current: Ampere (A)
 Amount of Substance: Mole (mol)
 Luminous Intensity: Candela (cd)
Fundamental Constants
 Speed of Light in Vacuum (c): $$(3 \times 10^8) m/s$$
 Planck’s Constant (h): $$(6.626 \times 10^{34}) Js$$
 Avogadro’s Number (Nₐ): $$(6.022 \times 10^{23}) mol⁻¹$$
 Gravitational Constant (G): $$(6.674 \times 10^{11}) Nm²/kg²$$
Formulas
 Distance traveled ((d)) = Speed ((v)) × Time ((t))
 Speed $$((v)) = (\frac{d}{t})$$
 Acceleration $((a)) = (\frac{{\Delta v}}{t})$$
 Newton’s Second Law: (F = ma)
 Work ((W)) = Force ((F)) × Displacement ((d)) × cos(θ)
 Power $$((P)) = (\frac{W}{t})$$
 Kinetic Energy $$((KE)) = (\frac{1}{2}mv^2)$$
 Potential Energy ((PE)) = mgh (near the surface of the Earth)
 Ohm’s Law: (V = IR)
 Coulomb’s Law: $$(F = \frac{kq_1q_2}{r^2})$$
 Electric Power ((P)) = (VI)
Dimensional Analysis
 In dimensional analysis, ensure that the dimensions (units) on both sides of an equation are consistent.
Significant Figures
 When performing calculations with measured values, maintain the correct number of significant figures in your answers.