psic

• Scientific Notation


  A convenient and widely used method of expressing large and small numbers. It facilitates comparisons and computations made during measurements.
• Using scientific notation


  1. Nx 10^n

  2. Where N is any number greater than or equal to 1 but less than 10

  3. And n is the order of magnitude or the degree of exponent
• Comparing measurements becomes easier using scientific notation
• Scientific notation


  • Positive exponent if original value is greater than 1
  • Negative exponent if original value is less than 1
• Significant figures should be 3 or more in scientific notation
• Decimal point should not be included in scientific notation
• Exponent should be a multiple of 3 in scientific notation
• Dimensional Analysis


  A process of using units and dimensions in solving problems
• Why we need Dimensional Analysis


  To solve for unknown dimensions of physical quantities/properties<|>To check whether equations are dimensionally correct